I think the consensus is that before trees are made collidable it must be possible to have everyone seeing the same amount of trees in an online session. In that sense, a "game should conform to max settings" proposal isn't very feasible when a percentage of people still have performance issues.
I mean, we can't tell people they have to fork out $500 on upgrades before they are allowed to fly online with us and then complain that we fly on empty servers
Online play will focus on the lowest common denominator until everyone can catch up, just like it was in IL2 with server admins and mission makers fine-tuning the amount of flak for frame rate reasons. I'm not trying to be confrontational here, just saying that i expect things to progress much in the same way they did with IL2, it will be a steady but slow pace and that's largely out of our control.
After all there's no use for someone paying the hosting expenses for a dedicated server box if people won't fly on it, hence they will probably strive to make it possible for people with less than stellar rigs to fly with them too.