Gomes had an OPS of 1.056 in May. It's not surprising that some were arguing his defense wasn't bad enough to out weight his bat at that level. Meanwhile his UZR and Dewans plus minus were already atrocious. Ignore the run value. He was the worst defender in left by just looking at plays.
He didn't get worse defensively as the season went along. UZR and Dewan's showed a guy who was very consistent in that regard. People mostly just got less tolerant of his defense as the season when along when his bat became a noodle and it was clear that shoulder/spreadsheet counterarguments held no water...