under learning mode it says No clock. No pressure. so it's probably intended. Although I too would have liked the option for a timer as that gives me more data on how I am doing in a session.
I liked to set goals like get all puzzles at a specific rating level under 5 seconds per puzzle. and it was helpful with a timer to know not only ones I get wrong but ones that I am too slow on.
but now I just set a timer for 1-5 minutes and try to solve a specific number of puzzles. which is still helpful and fun with the new interface. but having a timer option would be preferred.
This isn't a bug report, but when I am in learning mode, I don't have the timer, pass rate or target/average time. Could you re-implement those? I don't know if the same thing applies to rated.