Icon packs are coming. [1] Steam accounts can be imported if you have root access, or you can try [2].

IIRC Steam codes are almost standard except they use a different encoding because... Valve likes to roll their own stuff (?). I agree that trading makes only having codes a bit less useful. They could've used the same codes to confirm trades instead of an entirely separate interface.

[1] https://github.com/beemdevelopment/Aegis/issues/509

[2] https://github.com/beemdevelopment/Aegis/wiki/Adding-Steam-t...