Also i'd recommend trying to finish the Main story line (since it will be disappearing by 2.0) Including Grand company quests

And if you like achivements perhaps try to find some folks in your LS or a group to try and get all they Aetherytes and nodes so you can get that achivement before its no longer attainable in 2.0

Oh and per the news, Lvl to 30 and try and grab your Gobbue

Yoshi-P did mention we wanted to give us a list of disappearing achivements/obtainables for 1.XX version. I'd recommend keeping an eye out for that if you want to nab any of those.

TL;DR, Try and finish all the stuff that won't be there any longer while you can. Would be a shame to miss out on the story line