Have played this quite a lot recently, and I have to say I like it.
It's a free-to-play Hero Shooter currently in Beta by Hi-Rez.
Is it an Overwatch clone? Maybe. But frankly, who cares? Very fast paced and the central game mode (siege) is very enjoyable with a bit of in-match progression thrown in.
So, if you've played a lot of TF2, you might find a lot to like here too.
If you're interested in trying it out, might as well use this referral link: Clicky
Also perhaps a good game for gathers, since everyone can get it without laying down 60 bucks.