There was a plugin like the RPG one for ZM, called upgrades, and it COMPLETELY broke gameplay in the sense that the humans would win 99% of the time cause they got too much speed and strength. Double jumping would be even worse, it would let people glitch out of maps or into tons of places the mapper didnt make for peopel to be able to reach. Also one word:bunnyhopping.
The 4th link says this: THIS PLUGIN ONLY WORKS FOR STARGATE THE LAST STAND
The medic one might be interesting, but could also lead to broken gameplay.
Theres a reason a lot of us on KAT/SKG never played on CTC cause we didnt like all the gameplay breaking plugins.
The Devs break the game enough with their failupdates!