Everyone will complain if at a specific point some featurs of an app will be restricted. So it is better to have it from the beginning. Beside that, you could "test" the modul as long as you want for free
If I maintain my apps until eternity could noone tell you. But you could take look at the changelog of other apps by me, eg FreetzMobil (http://tinyurl.com/ktzhcl3)
Handling of broadcasts like the "MEDIA_MOUNTED" are work in progress
BTW. Relying on a link shortener for URLs isn't a good idea.