Even more mind-blowing is the fact that Mami managed to keep one of her ribbons tied to Homura to prevent her time stop abilities from affecting herself throughout the whole fight. It took a literal bullet to Homura's head to even get the ribbon off.
Near the end of the fight, it's revealed that Homura wasn't fighting the real Mami, but a perfect copy of her, made from ribbons! Mami fought Homura to a standstill without being in any danger.
Sayaka predicting Homura was about to use her time shield and jamming its gears shut with her sword.
This is made even more awesome when you realise that when Sayaka first became a magical girl, her combat skills and awareness of her enemies powers were shown to be sub-par.
Even though it was an awful thing, the Incubators get some awesomeness credit for their Isolation Field. To explain, Madoka wished to destroy every witch before they were born, in all times and worlds, with her own hands. And the Incubators found a way to block it. Of course Madoka beat them in the end, but still.
You also have to give them credit for the guts and the scope of their whole plan. Sure, the end goal is horrible, but you can't help but have some admiration for the fact that the Incubators intend to bind a Goddess to their will and subvert her to their own ends. And even though it did end up backfiring horribly on them, the cold logical way Incubators approach things suggests that they probably had some evidence leading them to believe that they could actually do it.
Also props to them for taking the information Homura provided beforehand and trying to see whether such a system is feasible or not, despite having no proof that its not just some wild story from a human girl's imagination, and almost succeeding. They may be evil, but you have to admit, they make pretty good scientists.
Sayaka and Nagisa throwing off the masquerade. Between the giant, city-smashing mermaid knight, the endless waves of familiars, and the reveal that they knew what Kyubey was planning all along, it hammers home that the Law of Cycles is not to be fucked with. What makes it all the more awesome is that the Law of Cycles is basically an amalgam of all the Magical Girls Kyubey manipulated and ultimately destroyed through time and space, and by utterly wrecking his plans they're getting as close as they can get to payback. The whole scene can be summed up as the Law of Cycles going up to Kyubey and going "I outsmarted you! Nah nah nana nah!"
The battle between Homulilly and the magical girls. Madoka can't use her full powers with Kyubey watching...so Sayaka and Nagisa reveal themselves to be part of the Law of Cycles and summon an army of familiars to fight Homulilly's own army of familiars. Sayaka further summons Oktavia von Seckendorff to hold off Homulilly while Nagisa and Madoka attack the ceiling of Homulilly's barrier. We also get to see things like Oktavia wielding Kyouko's spear and Mami using a cake tank on rails to deliver the mother of all Tiro Finales. Once they break through the barrier to reveal Kyubey's isolation field, Madoka reaches out to Homura's remaining humanity and they deliver one final shot that punches straight through the isolation field and launches a Rain of Arrows on the flabbergasted Incubators watching from outside. It's one of the most epic fights in the entire franchise, compounded by the fact that unlike the Walpurgis battle, it isn't simply a fight to stop a super-powerful witch. The whole battle is at its core a colossal 'fuck you, Kyubey', and as detailed below, seeing him decisively, soundly beaten after millennia of being a Karma Houdini is truly satisfying.
Another awesome but horrible thing. Kyubey tried to observe the Law of Cycles so they could interfere with it. Guess what Homura did when Ultimate Madoka appeared in front of her. In fact, it's suggested that this is how she gained her new powers.
Homura essentially putting down Kyubey after the credits. It really underlines how Homura is in control of the new universe, with the Incubators' efforts now benefiting her. Though there are implications of Homura taking over Madokami's role and taking Madoka's power and memories from her for an admittedly selfish purpose. This in itself is perhaps the crowner of the Awesome Moments in the entire series: for the first time in trillions of years, millions of innocent girls from thousands of planets, a TV show, four Manga, three movies, a video game, and COUNTLESS time loops, the unthinkable FINALLY happened. Kyubey LOST. Until this point, he either straight-up won or walked away relatively unscathed, even if he hadn't gotten precisely what he wanted. But this time, the little fiend not only walked away with nothing, he and the rest of the incubators end up Homura's slaves. Say what you will about Homura by this point, but the fact remains she finally, finally, FINALLY beat him outright. And best part is that just like last time, he has nobody to blame for it but himself.
Sayaka with control over Oktavia as Summon Magic. Weren't we all hoping that would happen in the series? And the Witch itself is a juggernaut of destruction.
Better still, the way she first summons Oktavia (as opposed to images of Oktavia being seen in the background): she stabs herself through the stomach and heart, and it looks like her heart is used as bait to fish out Oktavia.... from her blood. Because of the 2D perspective it's less Nightmare Fuel and more Awesome, especially with the character development of Sayaka.
On a meta example, the movie itself being submitted for the Oscars, something that even Rebuild of Evangelion has yet to achieve. Granted, it was only a submission, but this would make it the first movie of an anime in being considered for the award at all. It's sadly subverted when it failed to make finals. Supposedly, the judges didn'teven watch it.