Implement Threaded Bulk Chunk Compression.
This offloads chunk compression to a new thread, which should help with the pauses often seen when teleporting large amounts of players.
Allow Configuring Chunks per Packet. This enables server owners to cram more chunks per packet, potentially leading to higher compression ratios, thus saving bandwidth and load time.

This is currently set at the Vanilla default value of 5, however initial testing seems to suggest there could be good performance / usability / bandwidth gains by setting it to its maximum value of 32768. Testers are welcome to experiment with this option, beware the placebo though!
Only create a single executor / compressor instance.
Only 1 class is compressible, don't bother interfacing.