whats the point of chucky's scamper ability

Exactly. They've killed his ability. They've killed basically everything that made him unique. When people critiqued him, it's like we were playing two different games. He's 110% with 1 dash, which already makes him a worse Blight (yet they wanted him nerfed before Blight, right?). All he had that was different was going into his mode which gave him stealth (which is whatever) and his Scamper and dash attack.

I was never that accurate with his dash attack. You couldn't be on console, and with PC you could just hard aim to almost anywhere you wanted, as always. So I defaulted to using mostly Scamper to catch-up, not the dash attack. I played him almost exclusively with the add-on that gave 2% Haste after a scamper, and even at weak filler pallets, good survivors would just act like it wasn't there. At best, he got a 50/50 slide out of them. He performed weaker at those tiles than any other killer, because he was 110% (112% with the add-on didn't make any difference). It was only at very specific loops which were long on 1 end and short at the other end where he excelled, and even then sometimes those loops had something jutting out, or there was obstacles around it, to where a survivor could still dodge the incoming dash attack. The window where you could actually get survivors was so small. But people insisted that he was the most broken killer the game had ever seen. Dude, he's 110% and can be counterplayed even at favorable loops. Due to ad populum, which always skews to the casual end of the playerbase, he was nerfed anyway.

And so he was then a killer who could only Scamper after his dash had begun. But that made it useless, because like OP said, the survivors can just vault a window like at shack, and hard hug the wall, so that he can't possibly turn to hit them. With old Scamper, he still had a chance to hit them if they didn't reposition in time, and they still had a chance to time him out on his stealth mode. Now the survivor won that interaction every time. But people said he was stronger (somehow), because his ability came back quicker. So him being considered decent in that state has made people imagine that he was WAY OP in his original version, when he wasn't. But then that nerfed version was further nerfed, because while killers like Nurse and Blight exist, it's the 110 killers that need nerfs, right? Clearly not showing casual complaint bias there.

His current state, most people are in agreement that it's trash, because he's got a longer dash attack but it's way slower, like the most choreographed and reactable thing in the game. I argued he needed a little help even in his original iteration, so why they have a change of heart/mind on what's adequate killer strength in the game, I'll never know. I stopped playing his original version, because after extensive testing I'm like, "There's a dozen killers who can do better than this." Chucky will be getting buffs very soon, but I don't think it's gonna do anything. You've already taken away the thing that will enable him to (possibly) beat good players, which is his manual Scamper. Without that, he's just a nothing killer. Sure, he can dash attack survivors out in the open or in a dead zone, but aren't they the ones who put themselves in that position? Or in any position where Chucky could possibly down them?