It would be nice if there was a way to restrict vocab listed for a specific kanji entry to a specific JLPT level like when running a search, instead of only being able to restrict vocab to a specific level and all the ones before it. Also, there is currently no filter for N1 and above, only for levels N5-N2.
I am not adding anything now, but by the end of the weekend, I'll have a new beta started (this is going to be a VERY short one, maybe 2 weeks). I don't plan on adding any new features except for one, but since this is an extension of what's already in there, I can probably get it worked in.