The creator of the wallet "Andreas Shildbach has provided a tutorial to extract the seed separately in a computer, using the file and the password, the result displays the 24 words. The app itself does not show the seed in plain text, for security according to the developers.
That's good. If it works with 3rd-party apps and especially desktop devices, it means you are not dependent on the Shildbach wallet to stay operational.
The fee options are shown as: High, medium and slow.
The exact amount of say/vB is not detailed on app, only on explorers.
The sat/vByte data should be visible during the transaction creation process. I see no reason to not have it. Newbies and those not interested in entering the fee rates manually can be given a choice to select between high, medium, and slow confirmation times if they want. More advanced users surely want to know how much they are paying, especially considering how bad some wallets are in automatically selecting the fees.
Even though one does not need that specific wallet, extracting the seed of the encrypted file requires to use some line commands on a console on a computer, which obviously is not intuitive for most of people.
About the fee selection, I agree with you.
Being able to manually type the fee one wishes to spend is important, and it is a feature that has been demanded by some of the wallet users.
If you feel curious, you can download and check the wallet for yourself (without sending satoshis to it).
https://play.google.com/store/apps/details?id=de.schildbach.wallet