maybe adding app for hardware wallets like Ledger or Trezor?
You mean publishing their own app for Ledger/Trezor devices like the native wallet app? Not sure that's even possible since you'd probably need to work with the developers. Pretty sure they will sway away from thing like this too.
The current set up for me is quite easy to learn, not to mention sometimes plug-in make it even harder for newbies to use it.