I've been LOVING the improvements in RotoBrush 3, and it's come in quite handy for pulling external alpha mattes for Resolve colorgrading.
However, the one thing that slows the workflow down is that you currently (as of AE 24.4.1) cannot batch export multichannel EXR files. You have to do it manually, one at a time, using the ProEXR exporter in the "Save Frame As…" menu.
This really slows down my workflow because I have to monitor each EXR export, then manually export the next comp when the. previous one has completed.
It would be a huge timesaver if you could render comps to multichannel EXRs via the Render Queue instead, rather than using the "Save Frame As…" menu.