I have a set of not exactly miniature; but very small chisels that has an oval skew. I preferred to use it over a flat skew; but didn't like the small size.
Since I also have the $40 set of HF chisels, I decided to experiment.....not much lost if the experiment didn't work!! I put my 1" chisel (which I don't use very much) to the grinder and rounded off the sharp corners of the "bottom" of the chisel. Probably took no more than 15 minutes. Now it behaves very much like the little oval chisel in my other set...much nicer to use.
Not sure I would feel comfortable "modifying" an expensive chisel in this fashion; but I would probably do it anyway.