... Why does this card say "unrezzed"?

Now for the more complete examination because of the 200 character minimum:

Three credits is expensive, and it doesn't let you swap rezzed ice, making it largely useless, as excluding derez effects, Reshape swaps one unknown layer of defence, that you presumably have yet to let the corp rez, for another unknown piece of ice, that you have no reason to think is going to be any cheaper to break; let alone be enough cheaper that you are going to get the money back for playing this card, let alone including it in your deck.

This probably worked on all ice in early testing, but either was misprinted, or was nerfed and didn't get tested properly after the nerf.

This card surprisingly has been given some life due to it perfectly targeting Jinja City Grid installs.

If you expect Jinja in your meta (especially when it's combined with Surveyor), this card has no restrictions for ice-swapping (besides the material play cost) unlike restricted card Inversificator or make-a-successful-run-on-HQ Escher.

Unfortunately, one of the two pieces of ICE swapped will likely still be unknown to you but I never said this card was good, now did I?