HI, sorry for the late reply.
This is one of the most requested features and something we plan to have in the near future.
I think pushing tracks to the top of the feeds is asking for someone to abuse the system to keep their tracks at the top of feeds, so that probably won't happen. But a way to highlight updated tracks would be good.
Pinning or rearranging tracks on your page is another much requested feature which we plan to have and would help highlight updated tracks too.
Versioning has been suggested too and would be good but I fear hard to implement.