Brood, Mesor you see, with your cross-voting thing 6 projects automatically receive the minimum number of votes required for processing, Add several projects your team likes (+3 votes to each) and + few that got enough votes without your alliance and that's a dozen+ of projects, something GM doesn't want to process every turn and I very well understand why. That's a huge workload and takes all the fun of making updates away
Besides, the fact that you never failed to support each others proposals make me think it's just a "you vote for me, I vote for you" deal
As for subrpoposals, I think you blame me here. I use those either as
a) Turning project I strongly dislike into something I dislike less or even like ( sometimes, probably, my subroposals wander too far from original, but generally those are related things. )
b) trying to make proposals that I like even better , by adding some details. (developing good ideas is what makes suggestion games fun)
It amuses me that you think that GM considers stopping the game because UR's proposals aren't voted
__________________________
As for solutions of the GMing problem... I don't know... Hard limit on approved projects per turn is how I would GMed that (taking X top voted proposals, using dice in case of ties) even if that isn't an ideal solution it's better than doing too much projects and burning out