That's a very good comparison. I hadn't considered it from that angle. I will say though that while OT Luke did make emotional decisions, we saw him running towards things in the OT, even if its not too wise to do so, and not running away from. I agree with what you said about extreme. This long self-exile to stew on his failure was too much. If Luke had taken a few months or year to figure it out, that would've been better, but to just shut himself off from his friends and family-the people who he had made those emotional decisions often for in the OT-does feel out of character.
If they had had TLJ Luke confront Snoke and Ben and get soundly defeated, and then he runs away to figure things out I could accept that better. But to just leave a mess he created, that doesn't wash. OT Luke took on responsibility, while sequel Luke doesn't (like sequel Han). They have to be disparaged perhaps as part of the Disney/Lucasfilm take on Star Wars.