Just play the whole thing. And this is coming from me, a huge Dawntrail hater who is officially unsubbing as of this week.
It doesn't matter how others feel, if you enjoy it then that's all that matters. And if you hate it, you'll have plenty of people who you can talk to about it. It's a win/win.
I will say that a lot of the folks who are upset are long time veterans who have largely completed most of the content they're interested in. Having a new world and story with new experiences ahead makes the game way more enticing to a sprout, as opposed to someone who's done everything they like in the game for years and are feeling as if they've lost the spark.