I agree with pretty much all the comments regarding GUI, it needs to be brought to next step definitely.
But I'd also like to see all currently identified bugs (and some are open for quite some time) fixed.
Lastly, let's also put the virtually non-existent User Guide (User Manual) on the table. What exists today is pathetic. ...it's one of main pains for new users and reason for so many posts in EdgeMAX forums ... How do I do xyz? Help me configure xyx? ...I'd love to see some real User Guide that describes each command into full details, maybe with some basic examples (examples optional). Heck I'd love to have it for myself. Some commands I just find by pure accident never knew they existed.