I've played Warrior a lot in Arena, and I think the frequency of weapons appearing hasn't changed. The main thing I'm noticing however, is that people are a lot smarter when facing a Warrior. Swamp Ooze popularity is very high now, to the point I expect a weapon to be Oozed at least once every match. I suspect it's also to counter Truesilver Champion. With this shift in meta, I may need to update my tier-list again.
Having said that, I do feel the pain of drafting only 1-2 weapons on Warrior. My advice is to be aggressive, lower their HP at the right time, and go into top-deck mode for the weapon as a finisher on their hero. Drafting charge minions is really important as a Warrior. If you see very few weapons, it may not be a bad idea to pickup extra Warsong Commanders.