I have a few observations and a few questions regarding OC200+TL-ER7206+3xEAP660 HD. all the latest firmware

ER7206 v1.0 Firmware Version: 1.3.0 Build 20230322 Rel.70951

1.1.1 Build 20220118 Rel. 60852  EAP660 HD(US) v1.0

OC200 1.0 Firmware Version: 1.21.7 Build 20221206

I have OC200 as a controller, which adopted router TL-ER7206 and 3xEAP660 HD.

All of those 3 EAP660 HD were connected into the wired MESH under the single site I don't use WIFI MESH.

I tried enabling under the sites settings: Fast Roaming, AI roaming, Dual-band 11k report, force dissociation

I've set RSSI threshold to -67

First, I will ask questions:

1. How to force specific devices to use nearer AP, for some reasons there is a bunch of devices that will specifically use farrer AP with much less signal quality. For example, the device is 1 meter from the Ap and will insist on using a second AP 8 meters apart with a signal of -77 instead of signal -31 on the nearer AP.

As I saw by reading through the forum, nothing seems to work for anyone for a similar thing. I've never seen any post where someone said that this thing is working.

I can't believe that TP-Link is allowing the business class of devices to absolutely not work as they were emphasized it. Is it possible that wired MESh is not working?

I remember when I had Ubiquiti that they didn't have wired mesh and that you could only have fast roaming and force dissociation over WIFI Mesh.

I have many Tp-link switches, like non omada class but still manageable TL-SG108PE and TL-SG1016DE. Are they breaking protocols for data going over them.

Why is this Omada working poorly?

2. Is it better that I put each EAP660 HD in a different site? Devices are physically in the same ip range in the same building, can they be used as same-name SSID dribbling clients in the same fashion as under the "one Site".

Can I physically set a policy to ban specific wifi clients from accessing one site and not blocking on the other two sites which are closer?

I have 30 or more wifi devices like power, light and sensor controllers, lots of light switches, many broadlink hubs and also many amazon devices. Sometimes I will have 50-60 wifi devices.

I observed that 2.4 is oversaturated, peaking at 90-100% with only 13-15 2.4ghz devices.

What's the deal of TP-link emphasizing easy 100 wifi devices for EAP660 HD.

What I observed is when 2.4ghz is utilized at 90-100% with just TX and RX, lots of devices would be unreachable or losing the functions, and vice versa. It's very ,verya bad.

Also the thing that's getting on my nerves is the clients list under the OMADA SND controller, is bad, unrelated to the real situation, 90% of the time it's showing wrong info, also every change you make takes a very very long time to take effect.

I have so many questions regarding so many bugs and problems I saw but let's start with these urgent matters.