The Enterprise looks rather plastic and toy-like in the Modern Video scenes. Might not be as bad as HTV but it's still clearly not as good as CBSD. I truly hope this is a work in progress but at this late point I doubt it.
That's not the remastering, that's the nature of the 4-footer. Season 4 gets away from much of the stock footage of the 6-footer. It inherently looks plastic and toy-like. That model only looks good from overhead, and when in darkness. Then it was not shot very well, because it was meant for SDTV. When the lighting is bright, the ship loses that sense of scale. The initial ILM work was feature quality, but later work by Image G was meant for TV, and wasn't meant to hold up in HD. No remastering in the world can fix all of that.