All TW games have RPS gameplay - it can't be otherwise. Just some of them have it less pronounced.

When the RPS is played down with many units of multiple roles, crtain units are way better than others and teh AI who can;t tell that performs badly with them. As long as the game keeps historical plausibility to a dignified level, gameplay considerations should prevail imo. After all, playing the game you are having fun outmeneuvering and outsmarting the opponent within a historically plausible scenario. Recreating conditions 1:1 is often hurtful for gameplay and the two have to go together, not against one another to have a good game.