I'm sure there wasn't any bellyaching when NWA got transitioned over to the Delta plan<sarc> The point is the NWA plan is similar to the UAL plan insofar as accrual vice "use it or lose it" . The UAL plan could work well if the negotiators extract the value that is warranted on this 7 year old contract.
IOW, it's not necessarily Delta is better or UAL is better. They COULD be comparable with modifications to the UAL plan. That is up to the negotiators and ultimately the pilots. Let them know. This is where negotiating in public can be a good thing, not verboten as some on here ascribe to.
BTW, however the NWA plan was implemented wrt to the already accrued hours after the transition, could provide some hindsight vision if major changes are made to the UAL plan.