I have recently got a Deco XE75 to check out.
I have to say I like it but to be honest it's border line unusable.

Here are some of my observations so far.

1) Constant message in the app:

Something went wrong while obtaining the client list. Please
reboot the main Deco and connect to the wireless network again.

<Rebbot Now>

I can't reboot every time I see this message, the router would spend more time rebooting than being a router.

2) Related to above, refreshing the client list is extremely slow, of the order of minutes when it should be seconds.

I can't believe it should take this long to refresh the client list. I did a factory default reset and reconfigured from scratch
and within an hour or so the problem came back again.

3) Constant disconnects

Let's call them micro-disconnects as they seem to be quite short lived. If I didn't have a VPN client running on a Windows machine
for which incoming connections are broken by this I'd probably not notice it that much.

While other routers I have used do have connection problems at times I haven't seen this same behavior before. It is causing
me a problem.

4) In the app I constantly see one or both nodes marked as down.
The light on the nodes is green and I'm quite sure if they were down I'd be hearing about it from family members.

This seems wrong and appears to need fixing too!