Agreed. Shows where the main characters get together can absolutely work. If anything, seeing those characters get more moments together and then allow other characters to get together feels great. I would've killed to see characters like Kelly and Janna find others they were interested in by the end of the show.
If you're going to make a huge part of your show about relationships, then at least flesh them out enough that they're satisfying in the end. Stringing people along just to keep them engaged is a winning strategy but it's the only thing your show will be remembered for and that's not good writing.