There are many interesting and important worker proposals for BitShares but in my opinion the highest priority due to time constraints is the following.
Worker Proposal: Report on EOS "Integration"

Several ideas are being considered for how "integration" with EOS might occur. Some of the ideas that have been developed by others are:

Modify BitShares block header and do side chain with EOS
Full port of BitShares to Wren running on top of main-EOS chain
Upgrade BitShares Architecture with lessons learned from EOS
Both, (3) and (2) with sidechaining

Each have their pros and cons.

If this future integration might be funded by a future worker proposal in BitShares, a report could be prepared and presented to the community.