Currently, the Larkinson Army's mech roster was heavily slanted towards medium mechs.
This was not a big issue in most cases. Medium mechs were the most balanced and versatile of weight categories. The general definition of it was that it was massive enough to resist a fair amount of damage while also being light enough to evade a fair amount of attacks.
Of course, there were a lot of ways a mech designer could shift this balance.
There were times when speed and flexibility were more important, so a mech design might lose a little weight.
There were other times when a mech needed to resist more damage, so its design consciously sacrificed a bit of speed.
Ideally, any mech should rank high on categories, but such a perfect configuration either didn't exist or required the use of materials that were worth as much as an entire first-rate state!