I tried pretty much everything Rick & it's difficult to pin down.
There is something to the sharing of big & small areas of the same texture, but it's not a direct link.
I've had the front fuselage blurred, even after removing all other parts that use that same texture.

(and I didn't miss any)
You can get some control over it by changing the part order in the model. Had different parts blur or be perfect, just through changing the part order around and recompiling.
Seems there's always at least one texture file that gets hit though.
I found it best to include the big texture parts first, leaving any smaller detail parts further down the list. Group any non-textured parts & put all transparent at the end etc.
Doing that I've managed to get it acceptable across all 11 variations of 1-11 model. Makes FSDS3 a real pain for me though.
Most of the time it's also linked to mip maps, but I've had blurred parts even with mips removed!
I like mips on my PC because it looks like there's no anti-aliasing without them.
Interestingly enough, if I put mips back in on the 748 textures, the tail blurs while the rest is perfect. Do you get that too, or is it my PC/vid card?
Had the exact same problem with gmax models I made too, but it's so complex that I couldn't find a workaround.
I'm sure it's just that MakeMDL isn't quite right.
DM