... which I'm guessing are really not major problems since all of those models have been used in released campaigns already.
NOThat is not the attitude you should have if you want people to help you debug.
I used a lot of models already in released campaigns, such as the UED Solaris, and
I still needed to fix them. The UED Solaris as released with WiH initially causes a
CRASH TO DESKTOP ERROR if you used its fighterbay in any shape or form, nobody ever found out when playing WiH because the fighterbay was never used (because they couldn't figure out what was wrong with it). And BP is a campaign put out by one of the most skilled teams in FreeSpace modding, with extensive testing and polish. Let that be the shining example of why you should
NEVER just assume that just because it's in a released campaign it is bug free in any shape or form. If even they could miss something, don't believe that anyone else managed to catch everything. Always verify and debug your custom assets.
Eliminate every possible source of error that you already know about, or nobody can help you with anything in terms of debugging. (In fact, if you don't, you'll never be able to help yourself either). If you have so much as a single warning, you should fix it before citing "strange behavior", because it may not be strange at all.
(For the record the solaris CTD is an improperly named fighterbay launch path (Bay010), which causes FSO to choke and die when it is picked - the correct name is Bay10. I presume this is fixed in the current release, as I've told multiple people many times)