The full redesign has been postponed because they are rewriting the whole program: https://github.com/vector-im/riotX-android
But this issue I'm complaining about is also present on the redesigned Riot Web.
Edit: sorry, I think I'm wrong. The current mobile version seems to already be the redesign though it looks mostly the same to me: https://medium.com/@RiotChat/riot-mobile-update-brand-new-ri...
I think it still needs a lot of work.
You're completely right that RiotX is where the overall usability fixes are happening, including ones which would solve your problem here. Good news is that RiotX is evolving fast though - we're putting all our resources into it rather than Riot/Android, and then the same UX will be ported over to Riot/iOS. We're aiming to get a daily-usable RiotX into the app stores in the next 1-2 months. N.B. that the UX will change substantially from the current prototype at https://matrix.org/jenkins/job/RiotXAndroidDevelop/.