What tools you have to fix loose figures? I use pic related to lubricate several loose WFC figures:
Siege Optimus Prime
Siege Hound
Earthrise Hoist
Earthrise Arcee
Kingdom Tracks (I believed he was made loose on purpose)
Kingdom Beast Megatron (Loose and top-heavy)
Kingdom Warpath
let 'em soak overnight and the joints feel tighter. Or course they'll smell like citrus but it's a small price to pay