So, This may just be me but does anyone else also feel that the Mantis replaced the scorpion for Halo:4?

I mean, the tank is slower, shots move slower, shots arc and its runs so tired uphill. Besides, how many multiplayer maps features a scorpion(without map packs) and how many feature the mantis? As far as I know its Scorpion: 0 - 1 :Mantis. What do you think?