I have MiFlex on my inflator, primary, and octo. Standard hose on my SPG... no HP MiFlex, and haven't had any issues after a couple hundred dives with them.
The LP MiFlex hoses do what I want (no jaw push when pressurized -- even replaced an Atomic B2 swivel hose with a MiFlex), so I'll be sticking with them. The LP components *are* redundant, so it's not a major concern to me enough to sacrifice the benefits I get.
I'm sorry to hear the HP hoses are having issues, and fortunately, the HP's don't run to the immediately critical components (rather to SPG's, integrated air computers, etc.).
I'll be watching, as well, for MiFlex's response...