I think it's worth adding: Super Street Fighter 2 Turbo HD Remix is a rebalancing of Super Turbo done by David Sirlin and officially supported by Capcom. David's design notes and commentary are really interesting.
Unfortunately it's basically no longer available, and most of its changes are extremely disliked in the community. Which is a shame, because the changes to Ken were overall great but the rest of the changes really tank it. Characters like THawk and Akuma are bad jokes (in each balance direction).
https://www.sirlin.net/sf-hdr/street-fighter-hd-remix-design...
I'd love to see someone do the same for Capcom vs SNK 2, but a guy can dream, right? :)