I think Flynn was the bad guy in all of this mess, he lied and he’s gone. There are a lot of investigations going on without any criminal headlines because there isn’t anything to report yet. There were communications mainly between Flynn and Kislyak, but nothing glaringly wrong.
There are patterns in the intel world that are worth investigating for wrongdoings that already occurred and might still occur and I think that is what the FBI is doing.
Most of hoopla in the media is just the lynch mob predisposition of those want Trump to fail, quit or be thrown out of office.