This same argument again just worded differently. The cause of the issue is the playerbase. The only way for a real solution will have to come from the playerbase as well. Nothing the game developers do will have more effect than using a band aid to fix a broken water pipe. Additionally a majority of people's "Suggestions" would require an overhaul of a very large portion of the game in regards to instanced content not to mention rebalancing defense and mitigation statistics for tanks to be able to handle the additional damage.

FFXI "meta" party composition when people made non cannon exp groups was 6 members. Tank, healer, refresher, dps, dps, puller/dps. 3 out of 6 slots normally had problems getting filled. Hint they aren't the ones with DPS in them. Which kind of hints that more dps slots in party comp does not fix issue.