I don't even think this is fair, because barring changes, this situation is only going to get worse. I mean, let's look down the road a couple of expansions. As of the conclusion of Stormblood (4.0, nothing from 4.1+), we're at over 500 Main Scenario Quests. We'll be at roughly 600 required MSQs to access the next expansion, whatever it may be. Closing in on 800 required MSQs to access the one after that. This simply isn't sustainable.
SE is going to have to make a choice: do they want to change course and stop requiring players complete every prior MSQ before starting the next expansion, or do they want to significantly discourage new players from sticking around? There really isn't a middle ground, from what I can see.