ZCash transaction very slow! Z -> Z can take 30min for create and 5 hours for delivery. Z -> T creation time is 2-3 min, delivery up to 5 min (may be more, I don't check this). Now queue of transaction on pool is more than 1200 transaction (all want minimal 0,005 - ok.. now you can see your coins at "Requested" field, but need wait a long time). Does using several Z-Addresses on pool for payment help in this situation? Don't know. Really can help using multiple zcashd nodes, but it not easy to implement fast.
waiting is not a problem, people just nervous about the uncertainty of situation, and they just want to cash it out early as possible because of hyped price..
i think its better for you to display
payout queue, so at least everyone know the progress even if its slow, and they know where their position at the queue