As fare as I understand there was some kind of solution iff you were willing to skip DMA. And maby some USB. But the pci bus will only run at 33 MHz. I don't know how the new driver thing would work with this
You need to turn off the USB on an XE with the DMA fix. The Micro hasn't been tested but the same solution should apply. The SI cards don't work in the XE so there is no option for Warp3D or Warp3D Nova. If 3D isn't important to you then the 4000 series do work reliably on the XE and there should be decent improvement in compositing speed but again it's not confirmed if they'll work in the Micro.
I think it's best to stick with what works and if you want to use newer cards then try and get one of the newer PCIe equipped systems.