There is already a ton of heroes that no one could have developed fully all of them and they will keep coming 3 per month. So even if you are multimillionare and could gear them up fully in minutes, there is still lack of stars, although in recent heroes that is not that important anymore.
Just keep calm and hope to not have many OP/crappy heroes. The least good of all in the past few months since Zem was Kong, and that is something. Old heroes either need a rework or need to be thrown in the trash. Tashi is now use in my server and he solo kills Zem not even letting him ultimate, that is crazy. Sometimes he even kill 3 heroes in a row with his non-god-like ultimate, and only at 3-4* ... The sage, as seen in the Ch11 boss, didn't look too well. He can be maybe a somewhat balanced for once heroe instead of all this crazy powerful lately heroes.