I love Beat Scholar, in this early stage it's already so much fun to use and play with! If you guys keep improving on this in a steady pace with cool new features and improvements, this plugin has the potential to become a huge bestseller in my opinion.
Some of my initial feature requests / suggestions / improvements:
similar to dividing an entire pizza in slices, allow for the slicing of individual slices. To a sensible subdivision amount (perhaps up to 9 slices within each slice and combined totaling up to no more than the current 1/42th notes). And only divisions on the first slice level. No need for a slice inception :) Makes for a cleaner UI, in those cases where one only need a small part and not the entire pizza in 16th or 32th notes for instance. Functionallity could be something like clicking just outside the circle + numkey-click to divide the enire pizza, and hover over a certain slice + numkey-click to divide a single slice.
display all of the values / properties of a slices (or pizza) in a small popup box when hovering over it (or perhaps by right clicking). Properties like velocity, used sample (by color, icon and name), current number of the slice and total pizza slices etcetera. Ideally with an option for entering explicit property values by typing.
right click and copy / paste / duplicate entire lanes like it is currently possible with bars.
polyrhythmic bars on lanes with individual beat tempos unsynced from the other lanes, I know this feature request has already been asked on the forum. A huge +1 from me. Same goes for chance / probability.
user definable colors, icons and named sample slots. I want to be able to have 5 unique kick drums in different shades of red accompanied by 11 cow bells in rainbow colors. And name each one them equally crazy :D
custom repeats and playback direction of patterns and bars. A user defined number each bar or pattern will repeat before moving to the next (defaults to no repeats). Also the playback direction of bars and lanes: forward / backward / random (defaults to forward). An even bigger step up would be something like an advanced bars / pattern chaining interface. For inspiration take a look at some of the HY-plugins sequencers, those have some form of matrix style chaining. Some other drum sequencer plugins offer this as well.
I'm sure I can think of a lot more, but this should do for now :)