Personally, since Bows and Hammers are slower and A-Net has seen fit to accommodate them with increased vampiric, I think they should accommodate them with increased zealous mods too. Either 2/1 Zealous mods or 3/2 Zealous if 2/1 is too powerful.
3/2 would be too hard to use, especially on a warrior. 1.5/1 or 3(50%)/1 would work fine. But apparently, no one cares enough to really complain about them.