My qualms with it are only cause from max distance, it can still get punished. But after using Vega for a minute, you can make even the worst slides effective, as long as you make it so you can’t eat something nasty.
I mean, from max distance on a shoto, you can probably eat a sweep from Akuma, C.mk > Hadoken, or Forward s.Mk from Ken. From up close, you can eat a Shoryu FADC ultra, so don’t do it. But if you use it for characters with bad footsies, or from slow and slideable fireballs, its a great move.
I miss his Turbo slide, but I don’t mind this one that much cause c.mk is gdlk. Just wish it was easier to slide the fireball.