I like all of these. I'm a fan of not giving a crap about tradition if an alternative makes more sense. It's the same reason I switched to single length irons once I found out they existed - in my mind, it was an immediate "yep, that is a better way to do it" moment. Haven't looked back, and results have been great for me. Can't imagine why I'd ever play variable length irons again.
Watching some of the guys on tour, even successful guys, I see a lot of stuff I would not want to emulate. Lots of up/down movement, lots of lateral slide. Never made sense to me to add excessive movement into the swing.
For me, right now, I feel like I sit on a spot and don't move from it. I rotate without shifting my weight back significantly, then rotate back through without shifting my weight forward (since it never really went back.) Consistently of contact is excellent when I execute this, but the ol' habitual hip slide to start the downswing can creep in and sabotage my efforts.
Thanks for sharing.