If WiFi printing is essential, then add it to your personal list of desired features. The point of the original feature list is to point out things that will save you money. The point of the anti-feature list is to point out things that vendors typically add-on to make their product more enticing yet don't necessarily add value.
Take WiFi printing. The typical WiFi router has ethernet ports. In that case a printer with an ethernet port is WiFi accessible, is typically easier to setup to be WiFi accessible, and is indirectly upgradable when WiFi security standards change. (The latter is important if a printer lasts 10+ years.)
It is also important to note the original desirable feature list can be modified. PCL emulation, rather than PS emulation, is typically fine. The point is to avoid printers where the drivers are vendor/model specific. USB only or USB/WiFi is fine, as long as you realize that network printing requires (or, at some future point, will require) setting up a print server.
Edit: also, I cringe slightly at the Brother recommendation. I use their printers and only have good things to say about them. Yet the important thing is to avoid the games many vendors play. There may be other vendors who don't play games. More important, there is nothing preventing Brother from playing games in the future.