WOFF will not be exactly the same as WOTR, many things are different, and we haven't finished making the Add-on yet so hard to say what fps will be - we have more things to do, before we test, optimise etc.
Incredibly excited for the Add-on. While I am currently being quite stingy with my purchases in a plan to have my credit cards totally paid off by the end of the year, anything WOFF UE related will always get my money. Locked and loaded sir. Can't wait for the details.