-madara was being an edo knew he would regenerate so didnt bother dodging. same logic he used when he pulled out two meteors earlier, he knew he would also be taken out but didnt care as he was prepared to use his edo body as an advantage.
-that was a wood clone Tsunade hit. madara purposely set it up to bait her as he knew only he could see through it with his doujutsu back in his fights with hashirama, she fell for it. if it was real madara, rest assured Tsunade would have been fodder slapped back to where she came from.
-i dont know what your definition of not reacting is but he clearly reacted to gais assault and negged him before he could unleash hirudra, he reated fully. heck he could follow a superior version of gai makes this scan pointless