I would argue that due to feedback on camera-ui replacement's initial inclusion, this should not replace stock just yet.

As there are a lot of people not yet using this, I would like to see it installed along side stock for testing in the next cssu update. You could force it to be default player but add a temporary menu to associate mime types or restore to stock. Once the bug reports start coming in for the next update, check feedback. If all is ok, remove stock in the following release. This way if the user encounters a serious problem, they have an easy solution.

On a side note, if it is included will we have to wait for each new cssu release to receive updates to omp, or could it be updated mid cycle.