Luke projecting in TLJ had a lot more importance than Yoda projecting in the prequels would. It has consequences, for example Luke can’t be killed by Kylo Ren because he’s not really there. Yoda projecting would just be an unimportant detail since it doesn’t have any tangible effect, and would probably undermine Luke’s projection in TLJ.
Don’t let me get in the way of anything, but I think projection Yoda is a bad idea.