That's good then.
Bossk is Bossk... He's been portrayed as a Jedi-hunter in toys, actually, so I'm ok with him showing up. Excited, actually. I want to see him collect some lightsabers.
But Bossk also probably has 10 total seconds of screentime too.
Not like it's Lando, or Han, or Chewbacca becoming a major player in a storyline or something. That's my sort of fear of it all, especially with how Chewbacca was basically crowbarred into Episode 3. He was very unnecessary, much less being there with Yoda specifically... and yet Chewie in ANH is "making fun" of Jedi. It was just not necessary.