thay said u can upgrade guns but can u do the same with swords

Woweeee!!!!!!! Can I have your autograph, huh Nostradamus?

Nice one.

I'm not sure about sword customization aside from aesthetic changes. There's a preorder bonus that gives you two different sword designs but as for gameplay, I can only imagine the upgrades being new techniques such as the lift and shockwave. So yeah I guess you can only keep updated until then.