@Portamaris Before you get to involved with switching everything over, you can also compare by putting the BT Router back on, and testing also. Are you a android or ios user. If android app called Netspot is very good at showing how the wireless signal is. Also there are some settings that may improve you EE Router, you need to let us know, model and also if you have any wifi booster's/extenders/powerline with wi-fi. Reported that the BT Smarthub2 is better than the EE Smarthub+, they are not apples to apples, so some plus points and some negative, important also have you now changed/landline to DV or not using at all. You could easily position a router few feet left/right/up/down and have a better experience, do keep that in mind...
