To your response, I agree very much so.Herbivores do already run (from every carnivore, regardless of threat). If you’ve ever seen a herd of elephants when a pride of lions walks past, you would know that running away is not the first instinct of every herbivore in nature. Elephants will act aggressively, spread their ears out to look bigger, trumpet loudly to scare the lions, and even charge at them. The same can be said for rhinos, cape buffalos etc. Buffalos even go on the offensive to actively attack lions occasionally. Granted they do also run away in scenarios where they are caught off guard, but often turn back around and fight back once they realise what’s going on.
These comments aren’t really relevant to the post though (let’s try to stay on track). What are your opinions on the combat stats?
And yes, to get back on topic. I personally haven't tried out the new Pachycephalosaur combat mechanics yet (I'm not that big a fan of making animals fight each other, even fictional ones). But I do think that sure, if some things seem unbalanced some slight tweaks could improve things very much. A Pachy should probably be able to kill some smaller carnivore like a raptor. But it probably shouldn't stand much chance against an Allosaur.