Hidden, secret kits are one thing. Useful kits (extra MGs, AT Rifles, Medics, Sapper Kits, Sniper kits maybe) should be in easy to see, pronounced places, like on tables or in the gun racks and all in the same place/room. A new batch should probably spawn at each flag as the battle progresses.
Super special kits (Sniper maybe, Grappling Hooks, Deployable Mortars/MG, and Easter Egg kits like the boxing kit and Indiana Jones kit) should probably be kept away from the front lines, but not overly hard to find. They should still be in appropriate places (towers, command tents, a boxing ring).
A note on pickup kits: the Axis Rifle nade kit (Bayo, K98, Rifle nades and bandage) has only two rifles nades while the Allied Kit (Knife/Bayo, No4, Rifle nades and bandage) has 5. The Allied Rifle nades are already more powerful, why do they have more in the special rifle nade kit?