If people get bored enough to quite on the 2.X patch MSQ content then there is a good chance they aren't going to like levelling up in Heavensward that much either. You still get EXP and gear from those MSQ so its not like they are getting nothing out of it.

People talk like HW is an entirely different game. Its not. Even the story, which many do find better, wouldn't make much sense if you didn't do the groundwork in the patch MSQs anyway.