Was the bug with the disappearing blinking light data fixed? That always annoyed me in DMB2.
By the way, if you want to see what levels should not be like, here is
a collection of my 10 year old levels.

Let's just say these don't reflect the quality of my FS2 missions.

Some are really dumb as hell. The Strange Reactors one has all the goofy crap I could think of mixed into one insane level. Some levels are pretty unbalanced, so you will probably need the invulnerability cheat. The LS ones are relatively decent, although two of them are very unfinished. The lfexcntr one is an older D1 level that has a few texture glitches with D2X-XL.
Looks like I lost a couple of my levels at some point. The XP114R level was a pretty nice one compared to the rest of these, and there were also some of more dubious quality like robot zoo, humans vs. martians, impossible mine and rodent brawl (don't ask).
I also have a selection of 30 levels from the D1 Levels of the world package and the D1 Destination Saturn level from the OEM version. Many of these are quite nice but will probably work best with D1 3dfx.