Here is some useful features that would be great to see in v7!
Guys you are welcome to leave “+1” in comments 
capsman
- speed per client in registration table tab
- show speed in interfaces tab for that even for that configurations where Local Forwarding option is enabled!
queue
- show notification if queue couldn’t be processed because of fasttrack
graphs
- ability to save graphs
- draw graphs for the following wireless interface settings (this is very helpful to detect long time problems with wifi links):
- tx/rx signal strengh
- tx/rx CCQ
- noise floor
- signal to noise
web interface
- new sag icons for retina
- adept web interface for mobile devices
- delete/add table columns while designing skin
- more default skins
- quick search through whole amount of options
- reduce the CPU usage (now from 10-15%)
- log filterable by topics
- fix “ERROR: Internal Server Error” shown on login screen. Error comes with not expected logout
PS: winbox for MacOS pleeease