I prefer to think of ZUN's trumpets as crack. No matter how much you sniff, you always crave more.
Probably because crack is meant to be smoked.
The problems arise when your body begins to adapt to the drug, causing each subsequent intake to be less pleasurable. In other words, the first time I heard "Necro Fantasy ~ A Maiden's Illusionary Funeral", I felt like I was listening to the voice of God. I had trouble restraining myself from replaying Ran's theme at least 10 times, or even just the one section with the epic brass blasts. Now, the song sounds like trumpets and pianos to me. Good ones, of course, but the initial ecstasy and excitement degraded into a more mature, nostalgic feeling.
Yeah, for me it was the opposite. His mixing was so off that I was initially repelled by these songs, and later grew to enjoy them, or at least tolerate them.
On the other hand, songs like "Wind God Girl" lose their appeal faster because they rely only on the trumpets for energy. Indeed, ZUN's trumpets may be crack, but his pianos are LSD.
Again, total opposite for me. The composition of Wind God Girl is so good that I keep hearing new things in it all the time.
But yeah. I can't say if there was a change in composition style after MoF, as that was the game I started out with, when it was a new release. But for my personal tastes, the ratio of songs in the game to songs I love hasn't changed, so whatever he's doing, as far as I'm concerned, he can keep right on doing it.