I think you're probably right. I think the writer's don't think Veronica should regress, but Veronica thinks she should. It makes complete sense to me that she would try to revert to Veronica 1.0, not only because she has nothing to fill that void after solving the case, but also because she thinks that's what she's supposed to do. It's almost like the same way she was with her mom, so practical and cynical about everything except the for the idea that her mother would disappoint her again.

Because I find it hard to reconcile the Veronica we know in S1 to a Veronica that would want to get back together with Duncan. But I almost think that if her mother hadn't let her down yet again, she would have had enough fight left in her to realize, without actually dating him again, that Duncan and that life weren't what she wanted anymore. It's like, instead of being totally naive about that facet of her life, she chooses to turn a blind eye to her situation with Duncan instead, also giving her a chance to be avoidance girl when it comes to Logan, again.

So yeah. It'll probably take her awhile to realize that she can't fight who she's become, and then hopefully we'll get back on track with V/L. ;)