Let's be honest though since 2000 the Northeast Regionals have had plenty of names.
Initially real train names (which I prefer), then Acela Regional, Regional, and now Northeast Regional.
There really is no reason for The word northeast as other corridors don't run as Regionals. IE Midwest Regional, California regional, northwest regional.
But Amtrak went awry during the Warrington Era with the Acela Branding. Acela Regional and I think the other was Acela Commuter was just way to confusing. Cause let's be honest, calling every train Acela the traveling public would lead most to assume they are riding Acela equipment.
Yeah (as I said above), Acela Commuter was the short-lived branding of the Clocker - the unreserved, rush hour, NYP-PHL commuter service that accepted NJT rail passes. It was pretty ridiculous to have one type of Acela (Express) be the 457 mile, flagship high-speed service, yet another kind of Acela is a slow, 91 mile commuter service only offering unreserved coach. Ahh, the genius of Amtrak.