I can honestly say that the communities general competence has drastically dropped since I last played.
Virtually every single person I have done LFD with has been an idiot.
Skipping easily skippable trash is virtually impossible
If you don't have self heals as a tank god help you
Can be Tank or Healer doesn't matter you will be the groups top DPS
God help you if you try to DPS as a healer, with everyone at full hp, because your group will bitch at you for not healing.
After a 2 year break a hazy recollection of of the dungeons before cata were is still be best guide you will have in the group
And you better just ignore chat because some of the things that get said... "The less you are armored the more agro you get, cloth can't skip that group"
All my friends are gone, so I'm forced to pug everything and this does not make me look forward to LFRs...