Wasabi clients choose both script types randomly.
Okay, but that makes it less block space efficient. I do not have the exact numbers, however, but if I'm not mistaken the taproot would be 10% bigger in size.
Coordinators can restrict the allowed script types in their config if they want to.
Wouldn't it make more sense for the clients to select which script types they rather use? (In addition to the coordinators enforcing their own policy.)