Although I've found them to be "cumbersome" there as well, consider that anyone not using a script to send a file is probably going to be using that dialog. So it makes sense to have those items there. For those using scripts for sending files, the script could easily add those options right into the script and then you don't need access to them.
I think they are in a good spot, but I wouldn't mind either option.
I usually send files by dragging and dropping instead of using the DCC send dialog, and I'm sure there are others who do it like that as well.