Do the math for yourself. I'm in CA, and will lose a similar deduction for income taxes (I still rent though). However, before you freak out, realize that the math is more nuanced than that. Several considerations:
1. The standard deduction increased significantly. I don't have the brackets in front of me, but MFJ went from ~$13K - $24K. So if you don't have other major deductions, your total deductions still went up $10K.
2. Overall tax rates are lowered.
3. The AMT which likely bit you before (as a Californian) won't be an issue anymore. As a Californian, my state income tax deduction alone was enough to throw me in the AMT for several thousand dollars. Without that deduction, the AMT is no longer an issue (if it even survived the final bill; I didn't pay attention).
I did the math for myself based off a prior draft of the bill. My total taxes would change by less than $200/year, and I'm not even sure which direction. I haven't done the math on the final bill, but I don't expect major changes.
Don't let people tell you whether this bill is good or bad until you've done the math for yourself. Most people trying to tell you what to believe can't even do the math for themselves, much less for your personal situation.