Greg himself probably would give you different answers depending on when you asked him. The biggest problem Greg gives fellow mod authors is that he's very happy to radically change what he calls "progression" and then sort of reflect+proxy everyone else into oblivion when he discovers that they aren't keeping up with GregMeta.
For example, he radically led MachineMuse astray when she asked for his opinion of costing modular powersuits; even basic flight costing iridium plates was pretty absurd. But for awhile Greg was toying with tool nerfs and I think in the end even he seemed bored by it. Now he's been caught using Gravisuite because, crazily enough, the gravisuit is cheaper...