According to Zmodem some time ago, mIRC 6.42 which will be released December 22nd (ish) will have 4 new dialog controls (ProgressBar, TreeView, ListView, RichEdit), with the RichEdit having the ability to change colour, font and size of text in the RichEdit.
Agreed though, and maybe even an option to turn rating off altogether when submitting a snippet. As for the "5 1's = off" thing, maybe have a "Flag" option for unratable snippets?
FYI, I voted 7.