Well, for me it's seems that MTA is quite CPU hungry, specially with many players (spawns, many players, objects at the same place). Anyway, when I overclocked my Q6600 to 3,2GHz, I didn't marked any performance issues anymore. So on modern PC's there shouldn't be any issues i think. MTA gets improved all the time with new features and other stuff. It's logic that it will be more performace hungry with all these things. Sure, you can optimize software but give it a time. I suppose that it's not that easy.