As I've mentioned elsewhere, this Trump tax stuff doesn't smell right to me and I agree its release was purely partisan. It opens up the door to more of the same, and no doubt that will happen, just making things worse.
My point here is not that he cheated on his taxes (while I have seen that there may be some actionable tactics, I don't know and I'll believe it if/when it's proven) -- it's that the tax system he used needs to be improved and its holes closed.
So it's two things that occupy space at the same time -- yes, the release was partisan and cynical, and yes, the tax system shouldn't allow the wealthiest to escape taxes. I'm for a Minimum Effective Tax Rate, both on individual and corporate taxes.