L85 is ok.
If you want a nerf, p90 is higher on the list.
L85 is just too accurate (thats a trademark of the weapon). But the medic kit is fine, people just tend to use that gun because the other two are burst mode. And the g36e in burst is better than the l85!
And you can heal each other with that kit, so that makes it even more popular.
Kits are picked based on their utility: medic for the heals, anti tank for noobish p90 and wrecking armour, spec ops to troll flag capture and kamikazes, snipers for the camping, assault for flashbangs, support for spray & pray and nade spam, engineers to walk though the map (
)