You have to think further down the line. Take a look at the tier list I posted. If they change 1 move on Cinder, it's possible that both Orchid and Riptor could conceivably become more overpowered than he is, totally throwing the game off.
If you take a look back at the development history of SSF2T HDR on David Sirlin's website, you'll see that HDR went through numerous changes, particularly with Fei Long. At different times, minor changes him like, his chicken wing having less recovery, made him the most powerful character in the game. Then what? Buff everyone to match him and wind up with more overpowered characters and changes that have to be tested and made? It's a slippery slope that will wind up costing far too much in changes, time, man power and man hours to worry about it. It's really not fundamentally sound.