MIPS is a joke. That little improvement isn't going to do anything to prevent head trauma. Helmets are only effective in mild crashes...it's absurd to think people have so much faith in helmets.
For instance...I'll challenge any avid cyclists to take a trained professional boxers punch to the head wearing a helmet...your still going to get a concussion and your still going to hurt.
A helmet is better than nothing, but it's so wrong that people fear base people who don't wear one.
The lousy strap mechanisms and fasteners should be more of a concern than a MIPS design. MIPs is a proprietary gimmick.
Cycling helmet technology hasn't changed much since the original bell foam jobbies came out...