What revalation? If your talking about him working with a team he is trying to, but a change like that takes time. He realizes that he can't be a lone wolf, but he still hates aliens, he still refuses to openly accept the other rangers, Zordon, alpha, and later billy as anything more than a means to an end. He He is kind of like Dr. K from RPM in that dregree.
Also Adam still has his restored Mighty morphing powers, and even if he didn't, his character would still fight, because that is who he is. but I guess that can wait. Also, who ever said in the show that Billy got his powers back, who?
Also, Rito won't stay dead for long. I was thinking we could have him be our first Giant monster fight, then flee and be back on the moon.
Also Character changes take time. It's also important to read his bio. Patrick was betrayed by people who he thought were his friends. And so his attitude is a kind of emotional shield. He pushes away anyone who trys to be his friends so that won't ever happen again.