I removed all the grease from all the components, including the platter, using a combination of alcohol wipes and isopropyl alcohol. Applied a small dab only to the bearing, and re-installed the platter. Once it set, I think it was harder to turn than before.
Would VPI be open to me bringing the TT to their shop in NJ to take a look? I'm in NYC so it's doable. I contacted them this morning around 9AM and still no response.