Big rr could have battyrope, but certainly not tower race. Tower maps have special parts where you need to make a good turn in order to bypass a certain obstacle or fly here and there. Having batty for these parts would make the scheme very noob-friendly. Imo it would simplify the scheme too much. I'm also quite sure that most big rr maps don't require batty at all löl cuz they don't have such difficult parts, where it would help a player to stay on rope at the end of the turn. But for towers, you need to know where to stop, when to wait, and scout the map ahead.
Not sure about ldet, maybe it would be funner to play like that.. But with ldet you could shortcut big flies.. most hard maps you can just cheese by tossing your worm and not worrying about losing a turn.