Even if they are set in stone with turn-based that is not a reason to not continue to raise the question. They have more than enough time and funding and we have paid full price to alpha test the game for them. Changing this system to include RTwP will not change as much as you suspect as RTwP is turn based that is hiding it's artificial mechanics(such as being turn based). Everything in older CRPGs that are RTwP are still following the action economy faithful to it's definition in the PHB but it is hiding this from you.
The only difference is that the world will not pause and wait for you but no changes would need to be made in this regard as the desire for RTwP comes from people that use that challenge level as a benchmark and are more often than not seeking that thrill of the challenge. I do not think, in consideration of all these points, that it is not worth them spending the amount of time and effort to include the option to play RTwP. If modding features are included I will personally look into modding it into the game given that there is enough access to the engine and source code.
I really hope you're right... The main reason I strongly prefer RTwP to TB is that characters act simultaneously (naturally, not waiting idly for someone to hit them), not faster combat. It would be wonderful if we could have an official RTwP mode (or at least a well-made RTwP mod).
