Sorry I misunderstood. Thanks for clarifying.
Yes, that's pretty much what I was getting at. It's possible (I wouldn't say "probable," but maybe 40/60) they do get rid of it, I just hope they consider all the angles.
I guess you can say that isometric view was somewhat integrated into later games in a form of the camera distancing itself from Geralt's back in combat to give you a better overview of battlefield, since in The Witcher 1 isometric view was better for combat, while TPP for exploration, so they wanted to keep it in some form. It's possible they might implement similar integration regarding FPP and TPP perspective, so instead of switching freely between the two, it will change automatically depending on the context, for example when you use guns you get FPP view, but when you use melee weapons then it changes to TPP. At this point I think this is the most likely way they are going to do it.