New ideas/Suggestions :
Modify the plugin/update it
Like fixing some bugs(i dont know if this plugin has one)
and Adding new cvars:
[ ]amx_quadconcs <1/0> -> Activates plugin
[ ]amx_quadconc <Target> -> Give Player quad concs
[ ]amx_quadconc_admonly <1/0> -> Only Admins with LvL <Any LvL> can use
[X]say "quad" -> Activates Quad Concs
I think this will help a little with Quad Concs Control