I have the SmartHub2 running in pretty much a router only mode, which delivers the internet to a set of Deco M9s that I have for the mesh wifi. Most stuff is hardwired into a switch connected to the main Deco and the rest is on wifi.
I could connect the Deco directly into the ONT rather than via the SH2, but then I figured I wasn't doing my duty with respect to providing the BT Wifi hotspot service!
Buy once buy right.
I still have my Smart Hub 2 sat in it's box brand new as I took the Asus RT-AX88U route.
Spent many hours on this (and other forums) and confirmed this router did the job fine so made the purchase.
Expensive (like your Deco M9's are) but again we both have proved better hardware does max out the premium 900 / 110 package with ease. 🙂
Just closing the loop on this for those that experienced similarly weird/low speeds after having FTTP 900 installed.
BT were mostly great about it, sent someone out. Engineer was less than keen to get involved as I was getting 300, still decent but clearly not great.
He flipped open the grey cover on cabling outside and could immediately see the install job was botched. Twisted fibre, micro tears in the cover etc.
He re-spliced the cable outside, 5 mins later download up to 900 straight off.
I swapped my Google WiFi back in, even over ppoe it’s fine tho upload is halved for some reason, but huge improvement!