One of the mainly annoying things about the game is you spend forever looking for an area instead of being warped there as per usual, making it really annoying to find bosses.
"Ok, I need to go to Section E, I guess I'll go to D and see if that leads me there." "Ok, now I'm in Section M, great"
Also, you can't keep the X armor until you beat the game, which sucks, considering there is NO difference between the ZX armor (The combined X and Z armor) and Zero in Mega Man Zero, and I'm sick of Zero.