Hit 80 on this character less than a week ago, and I was able to transition from healing normal dungeons and such while leveling to max level content fairly easily.
At least, until today. The tank in the group immediately chain-pulled the trash all the way up to, and including the first boss, forcing me to burn major cooldowns just to catch up to him, and I saw no benefit to continue attempting the pull.
Reminder: What works with friends/guildies in M+ doesn’t work in LFG.