I am putting out a beta for 4.2.3 this week. This will have a fix to reduce battery usage and improve MAM performance. I dont expect it to be a very long beta periods before this is released.
Moving on to 4.3, which is actively in development. The UI is much more usable now. I need to make a fix so that joining a MUC is possible but beyond that it is at parity with the regular client. I will likely put out a beta for 4.3 once 4.2.3 is released. I have put out a build of the catalyst client with the new UI. Part of the motivation for the change was to improve the UI/UX on Mac and iPadOS. Let me know how you like if it you give it a try.