Valid arguments from both sides. I'd really like to see some of Rex's plugins/behaviors become officially adopted, but I know that probably won't happen, and if it does, not anytime soon.
I've already started to remove his plugins from one game I'm working on and replacing with stock event/action coding. Disappointing, because what could be accomplished in one line, requires several. Something like Pin To Image Point should be included in the official Pin behavior.
Vote for it here: https://construct3.ideas.aha.io/ideas/C3-I-421
And yes, I too would love to have Scirra adopt Rex's MoveTo behavior. I've added the idea, please vote for it here: https://construct3.ideas.aha.io/ideas/C3-I-440