There are several points you make here that I can agree with.
1. He's shown a lack of common sense/maturity during his time in the NFL. Although I put more stock in the Steelers lack of any reaction to Additi's story than I do in the story itself, you can't deny that his history follows him to some extent.
2. There's a perception that he doesn't work hard. I've seen evidence of this. But, I'm also aware of him putting in the time. Did you know that it was Haskins who organized workouts with Washington WRs during the lockdown so that they could come into camp with an awareness of the new playbook in 2020? How about the fact that between years 1 & 2 he shed 40 lbs and worked on his diet during the offseason? None of those things did **** for him when he made stupid off-field decisions, but they were signs of a maturing young kid who was learning to take his profession seriously. Personally, I'm glad that he's not out here showing off his "workout videos" and granting every interview request that comes along (So far). Might mean he's out there quietly working to improve. That said:
3) He's shown nothing to say he's the future in Pittsburgh. Pretty self-explanatory. But, I'll expound by saying that his reluctance to push the ball down the field during last year's preseason games was concerning. And, he seemed to lack the accuracy that made him so good during his one year starting at tOSU.
4) It would still be for the best if either he, Rudolph or both developed into something above adequate. I don't hold out much hope for either of them. Haskins has the tougher road in this regard (and a lot of that is his fault). But, he also has the higher pedigree and, I think upside, if he should be able to put it all together. (which I have doubts).
We'll see.