The general player base needs to improve

[Stanelis]

And yet it's okay to have expectations of your team to carry you through content?

Matched parties through duty finder aren't "your team", they are 4, 8 or 24 players picked randomly and put together in a group. You can't have expectations related to their skill level. If you have expectations related to the skkill level of players you play with, by all mean, use other ways to build you group (just like how people have been faring since everquest).