I guarantee if Paul was under investigation in the Commission case he would have whacked out Gotti and Angelo. Who knows maybe the mob would still be a force if that happened

Thats exactly what Paul was going to do but Dellacroce kept stalling and putting him off by saying things like "I'm working on it Paul" or "I'm still looking into it and making enquires Paul".
When Dellacroce died, Gotti knew he had lost his guardian angel and that he had to kill or be killed!