I think my primary reason for wanting RTwP over Turn Based is that in Turn Based games you HAVE to micromanage the actions of EVERY party member, EVERY round. Atleast, that is my experience with every Turn-Based game I have played. While every RTwP game I have ever played has always included an AI system so that you can generally let the party manage themselves for a couple rounds. Maybe people like micromanaging every party member, every round. I don't. If I was only micromanaging my own character, I would be more fine with Turn Based, but it looks like that is only the case in Multiplayer.
Ofcourse, as I have said before, RTwP is only as good as the A) precoded AI, and B) how thorough you make the pause settings. For example, PoE had very poor AI options, but decent default pause settings. So you can't put half-effort into writing the AI.
This is exactly how I feel as well. RTwP let's you "speed through" easy encounters or rely on the AI and put more focus on the harder/important fights.
Something that would work for me as an alternative to the time consuming, focus demanding nature of TB would be the possibility to let the AI control my party. Then I could choose to pay less attention during smaller, easier fights (and maybe even learn new tactics from the AI's perspective) and pay full attention and control the fight during boss fights or more important fights.