The Darrius on command grab was clearly unintentional so there was no scaling. However, I can't think of a single person that looked at this and said, "Yeah, Reiko has too much damage."
All I can see this doing is Darrius having even less utility than he currently does as people move to other kameos. You can get 330 pretty easily with Sonya on any of his combo touches and if you get a F1 an easy 352. Scorpion is similar damage. Serena can allow you safe confirms on B3. Striker gives great + frames to go with his toolkit. Sektor offers some good pressure and dirt.
I'm on PC so no patch yet, but Foxy did grab, Darrius, 34 ex slide, 3 grab and it was like 327 damage instead of the 383 or whatever it was before. If you get a 21 knee, 34 ex slide, 3 grab without Darrius then you're at 335. Different opener, sure, but I don't think it's worth bringing Darrius for a few percentage points.