Funny. Very funny.
The Overland Campaign was quite strictly overseen and directed by Grant. No major opportunities for corps commanders to either shine or commit huge blunders. Perhaps Sedgewick could take more initiative on May 14th, concentrate his men earlier, and flank Lee on the right - then again, Lee already had a division heading in that direction.
Unfortunately, I think it will be very similar to OTL, unless you can get Grant to change his plans significantly, given that he now has 2 very good corps commanders still alive.