Yes, I think I've stumbled upon that one before. It's not that far off from my stab at a Chieftain, which I guess isn't surprising. Well, except I wonder what they were smoking to give it Wisdom 23!
Maybe give a leader type a Feat? Inspiring Leader? Resilient? Slasher? Charger?
I was thinking maybe some kind of minor Frothing Frenzy reaction ability (like if it gets wounded it moves 10 ft. faster and can make a bite or claw attack as a bonus action for a few rounds), or maybe a rechargeable War Stench that affects a wide radius around the Trog and inspires trogs inside it to extra ferocity or tenacity (and is still revolting to non-trogs who catch a whiff of it).
Problem is, I don't want to make the chieftain that much tougher than it already is.
Plus, my aim is something one can imagine an "average" troglodyte chieftain having. Spitting acid like the Champion of Laogzed is more something an adventurer-type troglodyte would do, or a somewhat magically adept religious fanatic, not a run of the mill Boss Trog.