Even if the MSQ was to be made optional, there's so much other content,Beast Tribes, Gold Saucer,player events/RP etc. Hence, I said it's a matter of perception.There's always going to be players complaining that there's nothing to do in any MMORPG.
If tedious grinds have to be implemented in game to slow down player progress,it means existing content is not good enough/needs to be improved to retain subscriptions.