Funny you cut this paragraph:
Only the openly hostile troll nations drew the full attention of the elves. Small, sporadic battles ignited between the two sidea. Azshara was not interested in conquest. In her eyes, the trolls were a minor nuisance, there battle lust a symptom of a primitive and unenlightened minds. Ultimatelt, the queen struck an accord with the Zandalari tribe, which held immense influence over all other trolls. In enchange for ending troll incursions into night elf territory, the Zandalari would be allowed-by Azshara’s grace-to keep the sacred Zandalar Mountain south of the well of eternity.
Side note, it also explains what Azshara wanted, cultural and technological advancements. So while the trolls were playing a conquest victory(and failing) Azshara wanted a tech/culture victory.