The steam forum was quite active at the beginning of early access when there where some problems and gameplay issues, but almost everything is fixed now, and it's been a while since there was a big update with new levels and stuff, so people have less to say about it.

As for the workshop, the level editor is quite hard to master, and there is not much documentation on the frozenbyte wiki[frozenbyte.com] (although it recently got some new stuff), so unless you're really motivated to learn it by yourself, making new mods and levels is relatively difficult. But it's worth a shot ;)

I guess we'll see more discussions and activity with the final release. We'll see