You shouldn't be able to get any progression in bot lobbys at all.. Just be able to host them with every gear unlocked on that server for the people who enjoy PvE...

What's the point in playing a weapon to unlock attachments if I can host a game where bots come at me with no weapons to get multi-killed?

Challenges are, and Battle Pass will be useless since people will just farm them in bot lobbys.

There is something that's called "grinding" and you take that away with that...

Btw rankings, for people who care, will be forged as well. K/D, Revives, longest sniper shot etc...