I’m not completely sure this is worthwhile idea but I’m imagining a modification of the following desktop screen. Have an option to choose among the exisiting presets and create a new preset (preferably with written advice “It’s suggested that you create a new preset for your decks if they have a different material”).
There was someone in discord with unusually large number of daily reviews and they had everything under the default preset. So, even with a good RMSE etc. FSRS can perform very badly.
Take my case where one large preset has an RMSE of around 2% but the same parameters evaluated on my English deck has an RMSE of around 17% which is much higher.