Given how long it took to fix the federation issues back in december (0.19 update), I’d be hesitant about updating, too.
But you’re on a 0.19.5 instance. Do you experience issues? There’s some incompatibility with Mastodon, apparently, but given that 0.19.5 addresses serious privacy issues and has been out for a while without big problems, the privacy fixes are more important than keeping 100% Mastodon compatibility. Surely 0.19.6 will be out soon enough to address them.