I think Kakashi would have been fine with the microscopic bombs. They are made of chakra and Kakashi would be able to see them with his sharingan as a cloud just like sasuke did. Kakashi would be smart enough to avoid them at all cost.
Gai vs. Kimimoro (both at full strength): I think Gai would win, especially if he uses his gates.
I'm saying how would he avoid them? Would he bury himself undergound to avoid them even tho the bombs are in the ground, or would he have some unforeseen jutsu that would help him escape?