If SALT goes back to being uncapped (or more precisely, capped by AMT), this is a tax cut for people it applies to. While some states toyed with workarounds to the cap that came with the Trump tax changes, I don't think it happened for the most part and states didn't reduce their taxes to compensate for the increased taxes on their residents.

I wouldn't expect to see taxes being raised in the near term to compensate for reduced taxes on residents either.