I would rather have the t6b and t3a to r4 a champion then a random class gem
You dont want to make that gem generic, fine, atleast give me the catalyst so i can take up whoever i want. Id still have to use all the other catalyst like t5b and t5cc but atleast i would have a choice. Having it random removes all choice meaning that gem could be useless for many people for months or even years before they get the champion they actually want to r4 in that class. its the end of an entire act and the best reward is once again random, and it sucks.