It will still divide the PC playerbase even more. Nowdays it is a luck of the draw if we get a full group.
Now we have to test the content for them aswell, removing even more from the active playerbase.
Sure testing is good but a multi billion company should have afford to have some paid testers to make sure things work, not the paying playerbase!
On the other hand, if they leave the quality assessment on us, rather than paid testers, they have a better chance of coming up with something ACTUALLY good.
Once they've figured out the good game thing, full squads shouldn't be that much of a problem. I know quite a lot of people who are eager to return to Anthem.
Plus from what I understood, the PTS won't be a full feature set, so you won't be able to play it INSTEAD of the game. Rather it will be ever changing as they add and remove things they want to test.