We have added EPSV/EPRT support to the FTP Connect action. Looking at the client library code, it looks like it will fall back to passive if EPSV fails. EPRT is used with active (ie passive off) mode.
http://downloads.finalbuilder.com/downloads/automise/500/AT500_1137.exe
I tested this with Filezilla server which does support EPSV and the logs show it working well.