The most important features on the cloud would be the hardware configuration like firmware updates and SSID management. Beyond that, some of the nice-to-haves would be mass-deployment of changes like SSID/password or radio bandwidth/channel changes. Another nice-to-have would be client and traffic statistics for connected devices (just connected client data if hardware acceleration is on).
The two main reasons I’d like to move away from Ubiquiti’s Unifi equipment is that the controller software is often difficult to work with, settings often move between firmware versions, and the device firmware for the APs is often unstable. By contrast, GL-iNet’s firmware has been very stable (aside from one experience with beta firmware, but that’s a risk of beta) and it’s all based on OpenWRT which I prefer to Ubiquiti’s completely closed software approach.
As for which Ubiquiti APs to look at, we are currently using some of their Unifi AC Pro APs but if I were to recommend a new one it would be the Unifi U6 Pro if you were able to do 4x4 radios, or the Unifi U6 lite if you stuck with 2x2 radios. Their store pages are linked below.