Here is some reasons why I think Mediums are doing badly:
1. Abundance of Heavies and Assaults. Without any system ensuring only a certain amounts of heavier Mechs can be used, any Medium pilot can be forced to fight against almost whole teams of Assaults and Heavies.
Mediums are meant to be the primary force of the team, not the minor support.
2. Slow Rotation Speed
For supposedly being more agile than Heavies, the rotation speed can be rather pathetic, making it hard to use despite sacrificing the armor of Heavies.
3. Fire Power of Lights
Light Mechs can sport firepower that rivals many Medium Mechs that aren't sacrificing performance for more firepower. Combined with being faster, a skilled team of Lights can become far more valuable than a skilled team of Mediums.
4. Dead Too quickly.
Mediums lack the speed to avoid many heavier attacks, and do not have the armor to withstand them directly. While Heavy and Assault mechs can withstand a barrage of missiles without suffering too much, Mediums are just not fast enough to avoid missiles if they are not in a convient place at all times (thus the game ends up being even more like Peeka Boo). Combine this with all the PPC Stalkers...
TL DR: Not enough of a clear firepower edge to justify being slower than Lights, not enough speed to justify being squishier than Heavies.
Edited by Gunivar, 28 July 2013 - 07:30 PM.