Asana. It has its own idiosyncrasies, but it's faster, cleaner, supports things out of the box that I just gave up on in JIRA...
I've tried it before, it's just as bloated as Jira and performance suffers as a reason. If I'm going to suffer slowness anyway I might as well stick with Jira.
Having used Asana in several organisations, I think it being a suitable replacement for JIRA says more about how poor a choice JIRA was for situation than anything about Asana.
Ive tried Asana breifly a few years agoand it didn't seem to have enough to make it worth the effort to swap.
Maybe I should check it out again
I don't recommend anyone to swap from JIRA. Stability is probably more important for a PM tool, but for new projects trying out something new makes sense.