Before doing anything else, if you haven't already, update to the latest firmware (in the administration section of router interface)
I'm assuming the DSL uses the same / similar asus wrt as the RT version
if you worry about the data collected by trend micro, then I would suggest you never use google, fbook or any of the other data collection sites even windows 10 does it to a certain extent. However, to be able to block malicious websites etc it will need to gather the information otherwise how would it know what were trusted or not.... They will not collect things like banking or personal details... if you want to be even more secure, then I would suggest setting up a VPN client on the Asus so all traffic is routed through that (it will slow your speeds though).... After reading a couple of threads on here yesterday about people having their network hacked I think anything that makes your network more secure is a bonus, especially as it is free... once TM is turned on, do a scan from within the network security part of AIProtection... it should all light up green... AIProtection, does however knock a couple of Mbs from my download speeds
As for Bt web protect, I would turn it off, as I believe Trend does a similar job anyway.... unless you have manually changed DNS settings, then your router should automatically point towards the BT ones.
Also, as an addition, don't forget to set up the IPV6 section of the router (if you want it), go into interface, 192.168.1.1 enter user / password (change these to something more secure and personal) and on the left in the lower section, click IPV6, change the drop down from disable to native then scroll down to DNS setting, click disable and add DNS server 1 and 2.... (I use the cloudflare ones, but others are available) then click apply... you may also want to do this in your IPV4 DNS settings too, but personal choice.
To add a little bit of extra security to your network, if you have visitors constantly using your WiFi, it may also be worth setting up a guest network - you can even set a bandwidth limiter and a time out schedule on these.
People worry so much about nasties being installed on their PCs, laptops etc and use antivirus / malware programmes, but forget about other things on their networks, such as Cameras, smart hubs, TVs etc... at least if the software is installed at router level, it can help to keep opportunists out of your network (a serious hacker will get into anything eventually, but in fairness, most serious hackers leave normal people alone).
OH, and the latest version of the app for your mobile / tablet is pretty good too
