Disadvantage of a practice without timer
Every time I do a practice without timer and don't finish it because I'm out of hearts, there's no update of the strength of these words. While it's done in timed practice (which I don't really like to use because the timer doesn't stop after an answer). So, I think there's should be an update of the status of repeated words even if I fail to finish the practice.
What's the big deal about the timer and finishing within 2 minutes? It just gives you 5 points more, nothing else. The longest it's taken me to finish a timer practice was 11 mins, I still finished it! I wouldn't worry about the timer, just make sure you don't run out of hearts.