The plugin already quantizes the vectors and compresses the rotations to shorts prior to replication. However I did go in yesterday to clean it up a bit and set it up so the quantization level could be configurable instead of just whatever default I use. I have it defaulted to 100/2 decimals of accuracy and 10/1 should be enough for mm level accuracy. Technically with only replicating the relative pos within the tracked space I can also provide an extreme mode that reduces it even farther.
Also there is a replication speed setting on all of the plugin replicated objects that you can reduce below the default 100 htz (at 90 fps will trigger every frame) there is naive smoothing that you can turn on that will lerp in between updates at lower htz settings. The smoothing needs rate balancing and some additional checks but since you are working with so much data I guess now would be a good time to take a look at that again.