Hi Tim,
Yep, as David mentions WFA 2.0.1 should work fine, the major change comes with OCUM 6.0 which requires WFA 2.1. (Entire new layout for cDOT)
It's good practice to re-run the WFA OnCommand initialization exe on the upgraded OCUM server, as it will grant access to any new tables which may exist in newer versions. This avoids missing items in WFA's cache database if there is a new table to gather from, and I believe the 2.0 to 2.0.1 upgrade may include access to more tables for OCUM 5.2 (It was either 1.1 to 2.0 or 2.0 to 2.0.1 which caught me)
Kind Regards,
Michael.