MM is in beta, expected but not yet.
I had to drop BP too for the same reasons, the synonym nightmare and using English as a bridge for exercises N3-1 does not work well in my opinion…I’ve tried many times and applaud their content development recently, they have done alot to improve but until the main exercise gets updated, I just can’t use their system any more. I keep trying periodically, same outcome unfortunately.
My personal resolve has been the Kitsun Grammar Deck N5-N1, which is a comprehension deck I posted for both reading and listening which is really all I want for later levels particularly, just to keep the exercise in Japanese only and actually have some grammar ear training. Plus the sentence are a bit more straight forward to keep a grammar focus. I’ve used for almost a year now and it’s improved my grammar with alot less frustration.