If it wasn't on the CW, imo the way to go to really hit some emotional beats and good storytelling would be to have Barry really learn a lesson from passing up his opportunity just cuz he saw his future self shake his head at him.
So after Eddie kills himself, and Ronnie sacrificed himself, later on his dad would've been killed in prison. I feel like that would've been way to go. If not it would've just been hanging over the show forever. Barry's dad dies in prison, maybe a prison riot or attempted escape where he was trying to do the right thing and stop the inmates from killing a guard. Since it's the CW though, I would've threw them a scene where he's on life support and gets to have one last talk with Barry before he dies. Give him some inspirational and motivational message to make Barry start taking this **** more seriously since to me he still hasn't learned his lesson from not saving his mother.
This nonsensical Thawne as Wells confessing in a will video of all things and saying he knows Barry better than he knows himself and his dad being freed won't make him happy but I'll confess to the murder anyway makes no sense. That's made blatantly clear by his dad just leaving, so nothing about their relationship will be followed up other than the odd cameo.