Over-stabilizing, I think not. Over-engraving, maybe...a little. All just my opinion but rpm contributes little to bullet expansion or tissue damage. Even very high twist rates will result in only 1-2 rotations in a deer on a broadside shot. The engraving thing, I'm not real sure about. Match jackets tend to be thin so if you have very deep grooves, perhaps this would contribute to frangibility, but it would be difficult to quantify. If I was going to worry about adverse effects from high twist rates my first choice would be inflight blow-up, the second, jacket slippage. Both would be evident on the target board.
Boyd Heaton has posted several photos of exit wounds from the SMK's. They make a big hole anyway.