The essence of these requests is in accounting for all the score opportunities. There are two categories of those opportunities... the ones everyone expects to get and the ones that most people expect to fall short of perfect (which get considered more as a bonus that separates out the top scores).
The first category is everything that adds up to max combo for standard (this includes spinner completion, but not the spin bonus), combo stuff + droplets for CtB, and everything for Taiko (circles + slider ticks + dendens). For these objects it's always interesting to know your shortfall... it doesn't really matter if Taiko slider ticks and dendens don't affect accuracy (they also don't add to your total hit count), they affect score significantly and come in fixed batches that people expect to collect (or at least really try to). Dendens are certainly very important in Taiko and shouldn't be overlooked to focus only on slider ticks... there are some maps where the top scores have HR, but DT is not to be seen (even though the map is easy and slow enough that you'd expect DT), and the reason is simple, HR gave enough in larger dendens to dominate over even the HR+DT scores (which got smaller dendens)... an extreme example of this is the Loituma spinner map (HR gets a 129 hit denden for 38700 points, but if you add DT you get a 97 hit denden for only 29100). For Taiko, you really want to know how many slider ticks and denden hits were hit/missed. The missing information for standard and CtB has already been discussed.
The second category is Standard spinner bonus and CtB banana time bananas... this is where the showing information on the amount of spinner bonus and banana catches come in. It's yet another key piece in the accounting that can show why one score beats out another... as well as providing targets to meet or beat.