It's almost ridiculous that SE considers BRD to be more of a melee than RDM with this addition -_-
Not really... usually a BRD should be Dual Wielding when DD'ing. which means they're NIN or DNC sub, so they'd be keeping shadows/waltzes going, being they take big hits when they're hit.. So that being said, Fencer would have no effect Dual Wielding. Only really helps in campaign, if you're /RDM or /WHM, which I do alot, getting points, Hasting/Curing/Raise/Dispelling etc. I don't see BRDs DDing as something besides /NIN or /DNC outside of campaign usually. IMO this is really just so they can get a lil extra EXP in campaign.
But really though, RDM should be getting Fencer.