I'm not an accountant, but as I see it.
As with most everything, it depends on where YOU sit in the income chain. Especially in this situation. Gifts in this year (2017) for 2018 situations, are likely a very good idea. In the out years with the new higher std. deduction plan in effect, the high income major donors will be penalized. Low end givers (low tax rate) may have their deduction up front in the std. ded. and thus may choose to not give much/anything (hope not) and come out personal $ ahead (but school loses). Bad.
Our big givers (hope we have a lot) likely also pay a higher tax rate. So, a tax deduction is worth much more to them. (37% vs 15%) for example. Bad - So, in this case it is definitely NOT a tax cut for the rich that so many shout is happening. Maybe, bad for WFU.
On the scale low to high, the middle group (not sure how big/small this is) may come out about the same. There is potential bad for WFU in both the low and high end givers. Hopefully an improved economy will help most overall and carry the day.
As this plays out, it could be addressed again. But the complaints from the charities (not) receiving would have to drown out, "it's ONLY for the rich" comments.