Wondering if this is possible. can you loot the 2.0 orb before completing the 1.5 and then when it comes to that stage of the 2.0 quest just turn in the orb?

You can loot the 2.0 orb as long as you have access to Anguish (all 7 signets with turnin) and a completed seal of mastery:all (from either an anguish boss or completing the 6 mpg raid trials).

Short answer: yes

Can loot the orb at anytime, just remember that you need to be in Anguish for your final combine.

great thanks for the info guys. Im coa fully flagged so able to loot and orbs appear to be going to alts alot sooner then i anticipated so im not sure i can finish 1.5 before i have a chance at orb. Nice to know i can get an orb before 1.5 is complete. ty for your replies.