I understand the pain.
For app search, you can use my patch [Patchmanager patch] App list and search
Another one for “accessibility” (sort of): [Patchmanager patch] Homescreen running apps badges
App switcher/previous app: Unlock quickAppToggleGesture | OpenRepos.net — Community Repository System
I’m also working on Statusbar | OpenRepos.net — Community Repository System - needs a lot of love that I ran out of for today… It also includes the appSwitcher thingy, so install one or another.