Hello,
The vendor do require the ACL to edit an order if he want to change the order status.
You can limit the order edition to the order status if you want ; but he will need at least that ACL if he want to have the button in the toolbar while displaying the order details in the front-end.
Compared to HikaShop backend, HikaMarket do not let the order status be modified in the order listing, because the vendor do not see the details of the order and the workflow used by HikaShop do not let some plugins to work properly.
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.