I'd say try it.
If we end up not liking it, we'll update the rules.
I like the idea of reviewing a patch file, but reading through a diff file could be messy and as Mark Loeser pointed outMark Loeser pointed out, there may not be enough context to review the code adequately.
The reason I like the idea of reviewing a diff, is we can see the original problem and your solution to the problem, and then we could review whether or not you provided an optimal solution.