Watched Dan Who's review and his move around with no issue at all. So I ran him under the hottest water in my tap for a bit hoping to maybe just free up the ball. The peg definitely got softer but I was able to twist him into a position that I couldn't before. Have him in the freezer now hoping to harden up the peg and maybe wiggle him around a bit to just work the joint out.I'm having a similar experience. The joints feel really gummy, but he was just sitting out in the heat.
The leg articulation is not great. The hip and knees don't get much range at all. I know he's a big guy, but they can do better.
Still the best Juggernaut Hasbro has made...But held back by some poor design choices
Sculpt and paint are great, though. Just not a lot there in the way of poseability.