In fact, it still shows up in the new home as well. It's greyed out but still visible. I know another admin who turned it off and some users can still click on it and use it even though it's disabled.

yup, that's why it says ask your admin..." I'm guessing trying to get my users to pressure me into enabling it, which isn't going to happen.

There is also this setting  

Priorities is nether simplified nor will it help MY users organise their work. I thought it was lesson learned from the blueprints menu item everyone complained about.  

Yep, I've been pushing for that for years. It seems like every time something is added, admins lose control over it. ie., New Home, Balancer filters, for a few months the Blueprints icon in the waffle menu, importing from MS Project, etc.

That sounds more like a bug to me, especially if all the other pages behave correctly. It's pretty easy to fix.

EVERYTHING should be admin controlled. Menu items, filters, home area widgets, columns, views, summary panels, nav bars, etc.

To expand on @Sven-atClient's reply; while it is true you can't do exactly what you're asking for in a standard report, there are a number of "workarounds" and alternatives. If you want to see all tasks assigned to people on a team you own, you could: Ask "Are there any other fields you could use in...

Ah! I misunderstood the OP. I thought this was in Workfront, not AEL, Doh! Still, I've never heard of this happening and would be surprised if this was by design… unless of course we're talking hundreds of messages.

I think you should submit a support ticket for this one. I've never had that happen and I'm often bombarded with messages and replies. I'd be very surprised if this was by design.