Why not differentiate between longhaul EC en SH EC like DL? There, Gold and up get the seats free and Silver can get them free at OLCI. That would certainly be better for KL's own mid/low tier Elites whoes benefits keep declining.
Or, why not have the system that when OLCI opens and not enough seats are sold, Gold and Silver can select them for free. That way you prevent angry Gold and Silvers who may see non Elites getting EC for free.