I thought BTex had been working for a bit now via
BTexFanupdate.
Many of the packs out there have things turned off or hidden out of combat so you may be missing on some of the things these packs really can do. Also some authors leave pieces out like raid mods or dps meters as some users like very specific setups which they'd rather let you do yourself.
If you are interested in adding art and such check out
sunn-art (it has 11 theme packs) on curse.