RTwP was a terrible system for BG1/2. It's a terrible system to use for any game that is attempting to adapt a turn-based tabletop system to a videogame.
You couldn't be more wrong. RTwP works (in the present tense, not just the past tense) extremely well in all the IE games as well as the NwN games. It also works fantastically in the Pathfinder games. There is ZERO logic to the claim that if a game's rules come from TB TT, then the videogame adaptation must also be TB. Videogames are fundamentally different from TT games. The TB system in TT games is there out of necessity. Nobody chooses TB in TT games because there is no choice. TB is the ONLY way a TT game can possibly be played. However, there is no such LIMITATION in a videogame. So the limitation of TB in a TT game can be dispensed with when that game is adapted for the computer. It is merely a matter of whether the game's developers are technically capable of pulling it off or not.