On the minus side, nothing that was passed by the Democrat-dominated government can be repealed since any such action would require a strong enough majority to override a Presidential veto, and that is simply beyond the realm of possibility. On the plus side, no crazy new spendthrift programs will be added.
There is a fundamental flaw in our tax structure since its so-called 'progressive' nature has created a situation where a majority of the voters don't actually pay taxes and so have no direct stake in keeping the scale of government expenditures in check. Since Congress as an institution generally has all the backbone of a flatworm in fixing structural issues they've created by past vote-buying, it seems unlikely to ever be fixed no matter which party wins, and so we are running on economic momentum rather than a sound taxation and fiscal policy basis.
Vox populi, vox dei, as far as they can wrap their chubby little minds around anything, and so ultimately the day will come when the demand for bread and circuses breaks the bank for keeps, with Congress wielding the hammer or at least willfully failing to keep it out of the wrong hands.