Through transom scuppers

[CHANCE1234]

I will more than likely be redoing the entire transom this winter and was thinking about closing up the through hull scupers and having regular scuppers (like larger boats have) go out the transom. Is this a problem? I don't want to have to do anything to the deck in order to make the water drain. I am keeping the drainage channels on the deck and would think the water would still drain aft and out the transom scuppers even while sitting on the mooring. There has to be more to this as i don't think i have seen this modification. Maybe it has been, i don't know for sure. Does anyone see any problem with this? Thanks for any info.