Sorry, running a bit behind what with having spent the last two work days in a meeting room with lousy connectivity :-(
The discussion above is on the basis of 'what would we ideally like to have in the future' per the related conf call. We're not even at the stage of 'we will deliver feature enhancement X by date Y' yet. What we eventually commit to implement will depend on what other requirements we have competing for attention in the same timeframe and we don't have all that information yet.
For the AS7.1 release we've already delivered the final TS feature release, so if you want tx over remoting in that you will indeed need to build it on whatever is already there, which basically means JCA tx inflow.