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I just got my Deco couple days ago!
I finally got to test Deco's performance for online gaming last night.
Current set up is: Router - Deco 1 -------------------------------wifi------------------------- Deco 2 & Deco 3
So basically, only the Deco 1 is hooked up to my router.
When I checked the speed with each deco, the speed was decent: 120mb down, 12mb up in average.
I was quite happy about this but failed with online gaming.
There are three desktops for gaming in my house. All three of them are on the second floor.
Deco 1 is placed in the loft and hooked up to my router. Deco 2 is in my small bedroom which I use it as my gaming room. This room has 2 desktops. There is a small bedroom right next to this gaming room which has a desktop for gaming as well. So all three desktops are close to Deco 2.
Deco 3 is on the first floor next to my media computer.
All three desktops use Tp-link archer T4UH wifi adapter.
We were playing Heroes of the storm altogether and mine was the only one having some hiccups.
My ping would go up to like 2000ms and drop to 350ms.. Other two computers were having constant 70~75ms pings.
I decided to hook my desktop directly to the Deco 2 and the problem is gone.
But I am really disappointed that I cannot play online games unplugged while other two desktops were fine.
Is there any way to improve or fix this issue?
The game is just not playable when Deco was acting up crazy like that...
The mystery is that T4UH connected to my desktop sits right next to my another gaming desktop which did not have ping issues...
I don't think 1 foot of distance makes that much difference in wifi stability.

Please help! I rather use my deco's wifi capability to play online games!

I tried QoS, IP reservation, and just all the possible things that I could manipulate on the app...