Cracked screen on lenovo miix 320. The lcd is fine. The glass is just cracked. Can i just replace the glass or is it more complicated?

Well, if you order a new screen it should come with all the right cables to connect to your laptop. It shouldn't be much of a problem and quite simple.

Perhaps you can, but the two parts might be laminated at the factory. Contact Lenovo customer support that you paid for or search Ebay for the part for that model.