Hello! A lot of new Content is under development, so many exciting novelties will definitely appear in the game. In the nearest future, we don't plan to add Content with more energy, but it's quite possible later!
I don't want any higher energy levels on mechs as that would entail power creep. I think weapons could go up to 18 or 20 energy though. Something too big for even the high energy mechs to wield 2 of like the railgun 16 before energy levels on mechs got increased back in beta.