The plot is a mess...
i) Lee sneaking around without a mask and Ive no idea wat the hell hes suppose to look for.
ii)Lee supposedly captured but released by Han at the end to fight Roper, dude u kill his friend why would he fight Lee for u? Also why would u release someone u have no hope of deafeating at all?
iii) Men in black released from captivity and all of them went to fight Han's men(in white) for like no reason, it doesnt seem any of them were bady treated that they would want to take revenge by beating their captors and risk getting imprison again. Running away would have been the most logical choice.