Consider squeezing in a battle standard bearer wargor. Reroll primal fury tests is great alone for that. I prefer giving my gors shields if they aren't ambushing. Otherwise it looks a good list for its current points level

. Consider fielding a beastlord for his decent combat and leadership. Or a doom bull for all out combat ability at higher points. Maybe forget about centigors till 2500+ point armies. They suck up points ridiculously. Spawn are good for their points if unpredictable. But fit the army well. Though can work well in support of other units attacks or holding up rank and file troops. Otherwise more gors and a few chariots working in tandem to support your infantry should work well. If you take the ungor spear unit at higher levels bulk them up a bit. They arent very strong or tough but sheer numbers of pointy sticks takes its toll. Plus they need the extra numbers to survive in large games. Harpies are also a great choice if you want some affordable war-machine and solo wizard hunters. And I prefer bestigors to minotaurs but thats just a personal preference. Both have their places and good points. Again you'll need to take more to make them effective in larger battles. Finally consider taking a large monster. Be it jabberslythe, giant or ghorgon. All 3 are good. Only take a cygor if your adamant about it. I just cant justify the points to field a cygor for its abilities.