My rationale for the weapon kits are based on the fact that if you are dead and need to respawn, you won't necessarily have access to the HAT or the HMG kits, all the others are default kits that anyone can spawn in with.
Squad Leader preferences regarding the makeup of their squads is over to them, I'm not telling anyone that you MUST use this or that kit in your squad, this configuration suits me until I'm convinced otherwise. Plus it would also depend on the map and enemy the squad is likely to face, armor, air, or infantry.
But you're all missing the point and that is the squad movement formations themselves, the question we need to ask is do they work? Does the Squad Column in Wedge formation actually work or is it total bullshit?
How easy is it to switch from Squad File to Squad column during a battle, and then switch to Squad Line?