Its a combination of accessibility mixed with execution
In MVC2 Magento is a technical character, Juggernaut is not
C. Viper is a technical character In MVC3 and SF4.
Its the type of character that pays of well when you put the time in but will generally get you killed if you can’t perform their advanced techniques. Their basic mid to high level game usually revolves around some type of cancel, flight, feint, dash kara etc. or different stances or tight links.
Juggernaut doesn’t have any of this he hits hard has only one super and that super is a fireball motion you cant get less technical than that. Magneto’s “Basic” combo required multiple airdashes and not accidentally doing a different normal move in the middle of the combo.
CVS2 doesn’t share the easy mode design of SF4, i also contained more system feature,that you have to get used to both offensively and defensively. You couldn’t just jump in and play it like street fighter 2 because only one of the six groove played like that. Scrubs stuck to C groove and didn’t even use that to its fullest. The game had Parries, just defends, short jumps, guard counters both running and dashing, dodges, and a super meter that worked differently in every groove.
A- groove combos required a level of execution that made it useless if you didn’t know the combos because you were giving up your level 3.
P- groove was terrible if you weren’t a parrying master considering how slow your bar filled and the lack of options on block
S- Groove gives you a dodge and infinite level ones at low life for basically making your level 3 super unaccessible.
N- groove isn’t street fighter. Its chock full of good stuff but you lose lose dash and air block, It really good once you learn how to use it but until you do Cgroove is much better.
K- groove has a just defend but like P-groove you have no options on block and you meter is on a timer.
And all of that is a description of Pre roll cancel CVS2
Once roll cancelling was discovered everyone had to learn how to do basic special moves all over again. I spent hours and hours in training mode on that game trying to relearn how to throw a hadouken and do charge moves just to try to stay competitive.