Keep in mind that I believe this whole Fani Mugabe fiasco became the focus of a disqualification effort on the part of a Trump co-defendant, not Trump's legal team.
Another shot at a stake in the heart of the whole matter. From what is reported ad nauseam on TV, if Willis is removed from the case, her entire office is automatically removed. The judge even referred to this in the ruling, stating that Willis alone could not recuse herself, but her whole office would be subsequently removed. Apparently, were that to happen, the case is (likely by law based on how frequently this is reported) then handed off to another DA, for review. That review can vary, from carrying the case forward as it exists, to modifying it (more delay), or even killing it off completely (best case).
This would be the best goal from a legal standpoint, and why you would therefore go for the appeal. If however, you want to instead base your decision on the political fallout, and want to keep Willis hanging out in the wind, that is an option. My counter to that approach from a political perspective is while it might help with your core supporters, it could actually hurt with potential blacks you’ve been trying to court lately.