Thor reacquring the Odinforce would be a mistake especially under Fraction. The Odinforce makes Thor too powerful to use in regular stories. Under Fraction, Thor is such a short-sighted, hardheaded idiot that giving him practically unlimited power would be a disaster. Examples? Reviving Loki without thinking it through. Breaking a seal Odin placed up just cause Odin isn't around without alerting the All-Mothers. Now something evil and powerful is free, its Thor's fault, and he did not bother to tell anyone.
With Odin around Thor can go off, have adventures, and do just about whatever he wants because he knows daddy will be around to take care of things and clean up any mess he makes. Fraction's Thor hates Odin for telling him what to do, but needs him because Thor does not spend five seconds thinking his actions through and needs someone to bail him out.