Hi Thiggins,
Out of curiosity, what is the firmware version you are testing the ASUS Lyra?
If you are on 11142 and you have updated it before your testings and your results is what is posted, I find it pretty peculiar .... as in the results are kinda low.
Edit ~ Never mind, yours is on firmware 11014, my mistake for only glancing through the article.
I'm able to achieve 500+Mbps download/400+ Mbps upload Speedtest on iPhone 7+ @ the main ASUS Lyra with AiProtection default (enabled) Adaptive QoS is off in both star/daisy chain network topology.
Perhaps you might want to look into the connectivity strength between the nodes? Mine is all 3/2 green connectivity strength whereas yours is 2 yellow connectivity strength into consideration?
Someone have posted that ASUS Lyra operates 5GHz @ 300mW as compared to Linksys Velop/NetGear Orbi @ 900mW? i'm not sure is it accurate or not to begin with
Just my 2 cents.
PS ~ your reviews have always been very comprehensive and an interesting read.
Regards