We're talking about aesthetics, not the vinyl compound they used. The branding has been pretty consistent I'd say since they started.
If you want to talk about the sound quality, a lot of the early stuff used smiley face EQ which most people think sounded worse on a lot of the early pressings. So in that case, if they pressed the same albums today, they would likely sound better. A&R and annoying price-hikes aside, not sure what the "gimmick" is on the actual sound. Most of them sound incredible still. It's just the titles they choose that mostly suck.
edit: I also think they stopped pressing in Japan before they went bankrupt in 1999 when MD came along and bought them out but I could be wrong about that.