I think it will be a good thing if we can choose the default app for the keyboard and the shell

I prefer working with Anysoft Keyboard ratyher than hackers keyboard, it is not very painfull to change it but but Iwould prefer have the choice at the install.

likewise, i prefer using vxconnect for the shell, so i can't use kali menu to run into it and i had to run bootkali manualy to run kali into vxconnect