As long as they are disabled in instanced content and are reserved for open world. Just don't want clutter on screen. Full party & everyone having a pet. . . . too much. Especially when they give us those errr. . . . 20 people dungeons was it? Forgot the actual number for large scale instances they talked about.

Either way, I'm perfectly fine even if they don't do anything and just follow you around (though I secretly hope they'll have more use tied to housing in some way).