So I used a long time ago a polish(my nationality) repetition system for English, and the think that was very useful was the fact that if u looked for a word in dictionary you could directly see if it was already in your repetition system (there was plus and minus sign) It was very helpful bcs you knew that you have it in your repetitions. But I didn't notice this feature here, if you search word in dictiionary you don't know whether it is in your wordbank. On top of that it would be helpful to add the feature that you are able to add those words to flashcards immediately
Thank you for posting and sharing your idea. For repetition purpose, we have the Review track on the site. Please check it out. Regarding the Flashcards, please see my answer in the other topic where you posted about it.