sound-requests

hey,
i would like collect some thoughts about the flaws of existing electronic accordions. if you want to make an request, do it here.
more interesting for me are issues regarding sound and playability.
i would like start with:
the keyswitch between slow and fast samples could be more "flowing". with every sound you have an special speed of attack. some sounds so are more fast to play others less. if you increase the speed of notes gradually you get on roland at least a second sample that is faster playable. but there is a hard step. the same is valid for the keyranges up and down.
i have maybe 20 requests or more. but i would like know, if i am the only. and maybe there are another thoughts.
the backdrop is to build an own instrument for computersampler.
best - uwe