I think it is the Republican party showing its priorities :) Tax cuts for the reach are more important than anything else.

Hopefully we get a repeal of the corporate cuts, with even an increase to compensate for the years it was cut.

Corporate taxes are bad.

1) Their inherent complexity leads to a lot of wasted work and other distortions away from an efficient allocation of resources.

2) Corporate taxes charge the same rate to rich shareholders as poor shareholders: not progressive.

Cutting them is good.

There is also the fact that the renewal vote happens on an election cycle. If the republicans hold the house, the tax cuts will be renewed. If the democrats take control, they will be forced to expire the cuts since they are planning to campaign heavily on the tax bills as bad for the public. This means that if the GOP loses control, the following year taxes will go up on most voters and help reinforce the GOP narrative of the Democrats as the party of taxation.

The corporate cuts are permanent. Only the individual ones expire

Yes, I am aware. And my comment explained the political reasons behind that decision.