Hi! It's not related to ipi studio, but I think it might be a cool feature to have
the ability to save out the synchronized webcam/eyes -streams as separate files in full resolution. Than you could
use it perfectly for facial tracking. When you also add the feature to export the calculated camera positions as, ie., syntheyes file
it could be very convenient.

it might be not so urgent yet, but maybe think about it as an additional feautre for ipi studio later on :)

i think the most important, freatures will be the head and hands move/rotate tracking, will be nice.

There are several options to this. My pipeline is as follows:

Capture facial data with ZIGN TRACK 2 while recording vocal performance.
After voices are mixed together and separated according to scene I then -
Capture body via Ipi in sync with dialogue (playing along), additional facial capture via face cam and imported into Zign Track, and head tracking via FreeTrack.

Each capping session is logged and filed according to character, then imported into each character. This allows me to cap face, body and head.