9 pods. Wow. That's quite a bit more than the average user has. FWIW, we have read a comment here made by a CC employee stating that using too many pods can actually make things worse.
I think the pods are just for an average homeowner whereas the Cisco stuff says it will "keep your organization running". So, since the Cisco stuff is already known to work for you, I think that's where I'd go.
I can already tell what the problem is in your case.
So, I decided to buy 9 xFi pods when they came out in my area. I have the 1 Gig service which includes the new xFi modem. That is located in the basement where the homerun comes into the house. Right above and slightly behind the modem is the first pod. Then I continue to daisy chain the first floor with two other pods, one in my living room and one in my kitchen. Second floor has 4 and third floor has two.
So the issue I am having are as follows:
1. You cant manually assign pods to each other for a perfect daisy chain.
2. Moving throughout my house causes any device to be briefly disconnected. So Zoom sessions terminate. VPN sessions terminate. Basically any streaming or packet sensitive system fails.
3. Randomly at times I will have a wifi outage for no reason as if there is a wifi pod storm and neither of them will forward my packet in or out of my network.
4. At furthest parts of my home, my wifi is still spotty despite the wireless db signals are great.
5. Power outages crush my soul as the pods begin to lock into other pods which have weaker signals than the one they should be connected to. This causes me to unplug ALL pods and manually turn them on one by one so that they associate with the correct pods.
6. Randomly the pods will go offline, even ones right above the xFi gateway WHY???
I can say I never get any of this using my Cisco APs. Now that I have a WLC, it is almost tempting to swap back but here I am 900 dollars in the hole with this solution. Can someone from Comcast throw me a bone and help out? These pods seriously are lacking more advanced manageability and whatever algorithm it uses to associate itself to the best pod needs reevaluated.
The xFI Pods form a mesh network. They function best in a "star" configuration where your gateway is at the center and the pods radiate outwards like the points on the star or spokes on a wheel. Having too many Pods, or having the Pods too close to each other (such as in your daisy chain setup) will cause interference with your signals and their communication with your gateway.
If you want to keep the Pods, you will have to move your gateway out of the basement and reposition it in the center of the house, then install the Pods back one at a time so it forms a star configuration.