I agree, I have 2 AP22s (of three) deployed, and an AP17, and I'm holding off on the third AP22 because I can't reliably get devices to connect to the "closest" AP. I'll have a device connect to my AP17 while outside, as they should. They refuse to roam to either of the indoor APs, despite there being 30+ feet and multiple walls and floors between the AP17 and the AP22s.
Being able to tweak either signal strength or RSSI to help promote roaming would be a big help. If Aruba is aiming to take market from UniFi, they are dropping the ball. It should be easy based on the continued missteps and hardware unavailability from Ubiquiti.