Geese, no need to get pissed about it. Anyway, I've also noticed players star ratings change more frequently than V5. Earlier today I had a player in AAA rated at 2.0 gold stars. I brought him up for a month and he hit .120 and his star rating dropped to 1.0. I placed him on waivers and KC claimed him. Afterwords I checked out KC's roster and he was rated 1.5.
I actually notice it a lot more with pitchers. It seems like my starting rotation is constantly being changed because of this. I actually think it's sort of cool.