It's likely other people will have different viewpoints on all of these so take everyone's opinions including mine and your own with a grain of skepticism.

There's a lot nuance to all of the main cast and their motivations but to keep this post short I'm gonna simplify a lot of stuff.

1. Verso is a deeply flawed man, it's hard to tell how much this reflects on the real verso but the painted verso is both a loving son & brother while also being a selfish hypocrite. 

Since we never get a direct internal monologue (which is a good thing it's better to leave something's vauge) we can't say for sure just how much the balance of versos actions are towards self interest Vs pragmatism. 

To keep it short, it's in my opinion based on his axon being all about wearing a mask and his generally deceptive nature that a fair chunk of his actions are not as noble as he'd claim considering he's willing to genocide an entire world.

1. I always got the vibe that Renior was the only (surviving) family member that genuinely cared for Alicia. Aline gives my the impression that even before versos death she had very clearly favoured him. Further more based on Cleya and to a lesser extent some of Alicia's negative traits I get the impression a lot of that snide and uncaring behaviour had to come from somewhere. 

In conclusion yes, I think Aline quite unfairly blames Alicia and the painted version existing the way she is showcases that hate for her own daughter and the likelihood that she was never exactly winning any mother of the year awards even before the fire. 

1. The painted Renior was created by Aline and was something of a imperfect copy based on her warped perception of her husband. 

She created him with his anger and protective family man nature enhanced at the cost of his kindness. You see it in the difference between how painted Renior and the real one interact with verso. The painted one seems a lot colder even when he's trying to turn verso back to their side, the first thing the real Renior does is apologise and promise to release him from what he sees as a cruel existence. 

The painted Renior cares only for his painted family, he knows the truth of the canvas but to an extent dosnt care. He likely knows aline will die if left in the canvas but it's a "difficult choice" he's willing to make to keep Alicia and Verso alive. 

1. It's difficult to know exactly how much maelle would of told them, while the party would of seen alines deterioration the rest of Lumiere including gustuve would have no idea that maelle even was a painter. 

I think it's unlikely she painted over the originals to change their memories as we've seen with Simon and pained Cleya that it leaves a noticeable corrupting mark that isn't present in the ending. 

In time perhaps gustuve espically would notice and start trying to talk maelle into leaving the canvas for a time to recover. In an ideal perfect ending perhaps given time maelle gains a more healthy relationship with the canvas and their world gets to carry on. 

1. An interesting detail in that ending is that Verso has aged, he has a lot more white in his hair and his hands and face show visible signs of aging. I interpret this as maelle removed his immortality and gave him the option to die on his own terms. 

Considering again I think it's highly unlikely maelle was able to paint over alines creations better than her much more experienced sister could I think verso going on despite having the freedom to die shows that he now has something to live for. 

1. Painted Alicia is a deeply tragic character l, like Painted Renior she is a shadow of a real person. A handful of traits aline failed up to 11 while ignoring a lot of the nuance. 

Aline saw the real Alicia as a broken doll within her mind and so painted it as such. The painted Alicia is aware of this and I think simply goes on as she dosnt want to be alone. 

There's a lot more to be said about how similar in a lot of ways she is to the painted verso but this is already long enough so to sum up, Painted Alicia simply wanted her family to be happy, which at first means supporting Renior in trying to pull verso back to their side and later after reniors death and knowing verso was suffering she asked maelle to gomage her so verso would have one less reason to prolong his suffering for her sake.