I don't get why people queue for MSQ roulettes other than easy rewards for easy work.

If it's for EXP literally do your highest levelled dungeon, it's more efficient. Heck even a Duty Support run will be faster. Or do the Alliance raid/Earring strat.
If it's for tomes capping, if you need MSQ roulettes to cap then I can only assume your week was so busy you'd be forgiven for not capping this week.
If it's for the other tomes, neither of those are that important that you need to religiously clear MSQ roulette if you hate it.

Do people think FF14 is a mobile game and you need to do all your roulettes daily? MSQ Roulette is, as been said, a quarantine for 3 duties people don't want to do, so that people who want/need to do them for X reason can find reasonable queues. You cannot break it nor can add things people want to do, because then people will get even saltier when they get the thing they don't want to do. It is perfectly imperfect as it is. If they convert these duties to Solo duties, they would more than likely delete the roulette.