I dont agree, frames are really strong without the pasives of other schools. If you want Madurai's extra damage or Vazarin's extra armor, you HAVE to lose something. Why would you use Zenurik (wich advantage is the energy) if you could get energy in every other school + something else?
For the people who dont want to use Zenurik are Energy Pizzas who arent that expensive but, ofc, if you want to spam them everywhere ... it will cost you.
The problem isnt not having energy gain from other schools, the problem is rely to much on Zenurik when you can use Arcane Energize, Equilibrium, bring