I was really dissapointed when I learned that there would not have RTWP in the BG3 I was waiting for years. But I like turn based game a lot too so in the end, I just don't care.
Add a convenient TB system to a RTWP game is not the same than adding RTWP to game designed to have tactical combats. BG3 in RTWP would probably suck. I vote for 4.