I think that is about the perfect template. In addition to what you are doing, I set the volume on the BIAB tracks to their max before exporting. Even then, some still need a volume increase once in the DAW for mixing.

And, then it all depends on what is in your mix. I don't use much processing on the BIAB tracks - some light EQ on acoustic guitars and piano to get a bit more "sparkle" from them and to help them cut through the mix.

I do drop a Studio One preset called "S1 Drumgroup" on the drum track - it includes an EQ and a multiband compressor - and gives the drums some separation and oomph.

I also will add an EQ and slight compression to the bass if I feel it needs more definition.

And, like you say, the vocal is where the most work gets done - generally a longer chain of processors - EQ, compressor, delay, reverb.

There's no one-size-fits-all, of course, and there are many different ways to get to the end of the tunnel... in the end, if it sounds good, it is good...

150+ Songs produced using BIAB RealTracks
And 50 more...
and some more...