I'm the opposite of Chumbalaya, in how I feel. I like it.
I came in to 40k at the beginning of 4e (2004), and have continually played through now.
I think 5e may have been been the argumentatively best edition. It eliminated many of 4e's glaringly broken items (Consolidate into a *new* h2h combat?
) and was a good fast paced game.
6e was a distinctly different direction, with lotsa issues.
7e is still *really* good. It's like 5e's improvement on 4e, only for 6e. A lot of wonky 6e mechanics are gone, while keeping many of the cool, new items from 6e. It's not the stream-lined game 5e was, but still a fun, but complex exercise in killing Plastic Space Men. And no real killer stupid mechanics (not a cue to bring the ones that *do* exist up. Let's stay on Topic
).
Yes. Jumping back in is a good idea. A whole buncha new codexes in rapid succession means it's going to continually shift the meta and be new and challenging and dynamic for a long time.