I think the reason is that the same reason you don’t hear about ‘liturgical puppets’ being used at latin Masses. If you care enough about it to do the latin Mass thing in the first place, no way you are going to throw a puppet show into it as well, or any other craziness.
Freegards
It’s true; you’re right, it’s a gorgeous, heavenly Mass (no puppets!). It seems that my husband’s work schedule will allow us to take in the Tridentine tomorrow, and we’re very much looking forward to it.