Hi,
For the moment, this feature is not planned.
It is something which will be possible with "Mass Action" feature (or more interesting to implement in the mass action than creating a specific import system for it).
Some things are possible thanks to HikaSerial too (and the coupon generator).
But for the moment, if you want to create a lot of coupon/discounts, the best is to import them directly in the database. There is only one table affected.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.