I got friends saying its hit or miss.
I ask them if anyone attacks them but can't really go by that since no one really "attacked" us before. No reason for them to.
However I do have a friend in a region and he is saying its dead.
It could be just region based. Some area's have more players of a certain demographic then others.
Adults tend to play late at night or during the weekends and they usually have PC's. Kids, teens usually play when off from school or work so they were probably the ones supplementing the weekdays.
I'll give it a month or 2 before hammering down but Arena died almost instantly when players started to server hop to avoid PC players and then the nail on the coffin was when they fixed match making for xbox users. Now it takes me 20minutes of "searching the seas" to even get INTO an Arena lobby. With a full crew mind you.
sigh If they dev's realize its a mistake there is no way they are going to be able to undo the opt out. Their only option is to branch out the game through steam which I don't think Microsoft will want to do. Requires a TON of coding and extra work. Steam doesn't require windows 10, and if players joined off steam who don't have microsoft will mean they will need to get chat through discord or ingame or through some other chat service.
Who knows honestly.