I recently boosted a sheet of Fastarc G1 with 1 layer of seamoon, and I really couldnt see if there was any benefit.
Interestingly I have not boosted any G1. My ESN rubbers are 2-3 year old. I did not care if I boosted them and the sponges get too soft. If so, I would just throw them away. That's why I boosted them with two layers. So either it worked out well or I need to just dump them in the trash can. So far, I like them boosted. But heck maybe it is a placebo effect.
Would I boost a new sheet of (in my current collection) Rakza 7, Rakza X, Xiom Vega Europe, G-1, MX-S, etc? No. Some of them have plenty of catapult effects already and I want to control the rubbers.
But if they are 2-3 years old, I don't care at that moment.
FYI. I did boost a new Friendship 729 FX Super Soft sheet and it played terribly. I had to rip the sheet off. So I guess you should not boost everything either.