''VideoGame/ProjectM'' aims to satisfy the UnpleasableFanbase of ''VideoGame/SuperSmashBros'', but that doesn't stop it from facing some divisiveness of its own.
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* BrokenBase: Several members of the ''Smash'' community still prefer ''Melee'' or ''Brawl'' over ''Project M'', though the situation has been getting better with big name ''Melee'' and ''Brawl'' players' participation.
** Want to easily start an argument? Bring up whether Fox and Falco should be {{nerf}}ed.[[note]]Basically, they're controversial because they're generally considered the best characters, but are also both [[GlassCannon fragile]] and require [[DifficultButAwesome very skilled users to actually play better than the rest of the cast]].[[/note]]
*** On the topic of Falco, there's some arguments on whether or not it was a mistake to return him to MovesetClone status from his DivergentCharacterEvolution in ''Brawl''. Some fans say his animations were fine as they were and didn't need to be turned back into a glorified alternate costume for Fox. Others cite that Falco was the [[VideoGame/StreetFighterII Ken to Fox's Ryu]], and his playstyle was different enough already to justify changing it back.[[note]]Given that there's now a publicly available Clone Engine (known as [=BrawlEx=]) by a separate party, however, it's possible to have both in one's personal game now, and easily, too -- a Falco and a "Young Falco", if you will. All one has to do is follow the directions of the engine, change a few lines of the code, and move M!Falco's files over to a separate folder.[[/note]]
* DefaultSettingSyndrome: Since the general tournament settings are coded to be the default, this is inevitable.
* GeniusProgramming: The ProjectM Clone Engine was the first ''Brawl'' hack to allow adding two more playable characters to the roster rather than overwriting an existing character -- something which had kept eluding ''Brawl'' hackers who had been researching it for years. Eventually [[http://kc-mm.com/2014/01/16/brawlex-clone-engine-now-doing-the-impossible/ it was released independently]] of the project to the public.
* HilariousInHindsight: Several of the features in ''Project M'' have subsequently announced counterparts in ''VideoGame/SuperSmashBros for WiiU[=/=]3DS''.
** This game turns [[VideoGame/{{Electroplankton}} Hanenbow]] into [[VideoGame/TheLegendOfZeldaSkywardSword Skyloft]], where players brawl on a floating stage that tours around Skyloft. Cue the reveal trailer for ''VideoGame/SuperSmashBros for WiiU[=/=]3DS'', and Skyloft is one of the stages to be revealed in the new game, with the exact same concept of a floating stage that also tours around Skyloft.
** Most of the stages in ''SuperSmashBros for WiiU[=/=]3DS'' have a "Final Destination Mode", which turns them into something similar to the tournament-friendly versions of Brawl's stages featured here.
** This game splits the Franchise/{{Pokemon}} Trainer's trio of Squirte/Ivysaur/Charizard into three separate fighters. ''SuperSmashBros for WiiU[=/=]3DS'' also splits Charizard off into a single fighter.
*** Speaking of Charizard, the Charizard in ''Wii U and 3DS'' has a claw attack for a forward air, just like the one in this game.
** Zero Suit Samus, though already independently accessible in ''Brawl'' via an EasterEgg[[note]]Hold the shield button during the character select screen.[[/note]], was made into a completely separate character with her own picture on the character select screen in ''Wii U and 3DS''.
* LoveItOrHateIt: Opinions on the mod range from "It's the best ''Smash'' ever made" to "It's a deviation of a good game that didn't need to be fixed." Of course, this kind of debate is to be expected since the ''Smash Bros.'' fan base is infamous for how much it argues over how the games "should" be played since they offer such a wide variety of playing options.
** ItsEasysoItSucks: One of the common complaints from detractors is that the game increases the input window for a lot of Melee's advanced mechanics to make them easier for less skilled players. Other common complaints include criticisms about the ease of recoveries on most characters, and certain characters requiring a lower skill cap to match the output of high-skill characters (Fox and Falco, Melee's top-tier stars, are usually the baseline for this).
* MemeticMutation: 'Please secure your wrist strap to safely contain hype.'
* RescuedFromTheScrappyHeap: Many characters who were considered useless in either or both the Melee and Brawl meta are showing up as completely viable picks against Melee standouts like Fox and Falco. While the meta has yet to be fully fleshed out, it's already looking like the gap between high tier and low tier is much, much smaller than it was in Melee, and Brawl especially.
** A good example of this are the Zelda characters, who are infamous for being the more popular characters but consistently ranking low in tier lists. In Project M however, Zelda is ranked in 3rd place with Link in 7th place.