I don't know, if I would want to go the mesh route, because I already have a router, that I want to keep, but if I put the deco into bridge mode it will lose it's guest feature, right? also the mesh ones have less settings than proper APs (correct me if I am wrong), because they are targeted on less tech savvy people.

EDIT: Also the deco is WAYY more expensive

MU-MIMO is one of the most important feature of 802.11ac Wave 2. MU-MIMO technology can improve your home network capacity and efficiency by allowing Wi-Fi to communicate with multiple devices simultaneously. This decreases the time each Wi-Fi device has to wait to send or receive data from the Internet, as a result improving your home Wi-Fi experience. It will improve the wireless connection performance if you have two or above wireless devices using the Wi-Fi at the same time. You can refer to: https://www.tp-link.com/en/faq-2098.html

Maybe you can choose EAP225v3 or EAP245v3, it is the flagship model of EAP products.

Does a DECO do vlan when used in AP mode. Each SSID should have a different VLAN.

Does a DECO do vlan when used in AP mode. Each SSID should have a different VLAN.

Deco does not support Multi-VLAN function.