These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alternative Character Interpretation: Despite its doubtful canonicity, the OVA does bring up pretty interesting What If? moments and speculations. Especially in regards to the Satsui no Hado possibly being inheritable or related to genetics, since this version of Ryu is all but stated to be the biological son of Akuma.
Broken Base: While some fans love the animation, more than a few are put off by the character designs.
The implication that Ryu is Akuma's son does not please more than a few fans. Thankfully, this isn't even hinted or mentioned in other SF media so it's not hard to shelve it away.
Tear Jerker: The movie is... well, depressing, to say at least. The ending is a full-blown one, though.