Domain name no longer perfectly fits brand; better to 301-redirect the whole site to a new domain, or just live with it?

I have a site that's currently getting 100k-150k monthly views, mostly from organic traffic, and growing steadily, with a 50-something Domain Authority score.

But the domain/site name no longer really fits. Let's say it's something like WorldOfYoga.net, but the bulk of the site's content would now fit better with a name like GoodOutdoorLiving.net. There's some overlap-content that would work with either name, but not that much.

Would I be better off just completely rebranding and 301'ing all traffic to the new GoodOutdoorLiving domain? I'm worried that doing so would somehow lose a lot of SEO juice, and that I'd see a big drop in my hard-won organic traffic and DA.

Or I could create a sub-domain like GoodOutdoorLiving.WorldOfYoga.net and put all the new content there, and create a new logo for that part of the site that downplays as much as possible the vestigial yoga connection.

Or I could just leave things the way they are, on the assumption that site visitors are more interested in the content of an individual page, and probably don't care so much (and might not even notice) the domain name.

Any ideas?