All the offset does is let you adjust the offset of a single cutoff and resonance. That is a far different thing than having independent control over two cutoffs and res. A simple thing like modulating the cutoff of a low cut filter while modulating a high cut in a different-and independent way-is not possible with the offset.
I would say it is certainly more the exception than the rule to only offer a single cutoff and resonance when using multiple filters.
My +1 request still stands. 