I will say that MIM does not bother me at all. Two things bother me about current S&W revolvers. The internal lock and the re-shaping of the curve at the top of the frame to accommodate that lock. I have no issue about the lack of pinned barrels or recessed cylinder charge holes or the use of MIM parts.
My vote is to get rid of the internal lock and go back to the classic look of the frame curve in the hammer opening.
Thank you for listening/reading.