I stick with the old grandfathered unlimited yet for a 20% discount via my employer, something I'd lose on the new unlimited plan since it only supports discounts for active duty military and veterans. Before any taxes and fees it's $72 on my old plan with the discount and $80 for the new plan (assuming I sign up for Auto Pay which I'm not a fan of).
As for hotspot my phone is rooted so it bypasses any subscription check, when it wasn't FoxFi did the trick. Either way I've never used more than 15-20GB tops via the hotspot (usually less than 5GB any given month) so I'm probably way under their radar.
The only way at this point I'd consider switching is if/when I lose that employer discount.