-Garrosh is a brute when he attacks the dragons in Twilight Highlands thinking he can win. He's a brute because he attacks without making a plan, without caring what would happen to the rest of the fleet, without knowing if he can even win.
-trolls are ferocious when retaking their islands back. They go there and charge inspiring fear in their enemies yet, they have a plan, they had supplies, they know what would happen with the ones behind, they have it covered.
Now let's look at Tyrande in Warcraft 3:
-she goes and attacks a small human/orc camp at first. She has enough troops, she takes them by surprise, she knows she can win.
-in her race to awaken the druids, she studies the forces around, but she knows how she can sneak enough forces around to awaken them by laying some traps too and she doesn't go to bang her head in all forces at once (I remember after awakening Malfurion there's a map where the orcs, humans and undead are fighting, and she uses the opportunity to get through instead of fighting)
-she will take good cards to prepare for future battles (Illidan)
-she's aggressive in speech, but is willing to take reason (when she meets with Jaina, Thrall and Medivh, though she has a line before, she doesn't shoot either, remember Tyrande is an archer, she could have shot all of them from afar if she was truly a brute, but she didn't, she waited to see their intentions).
-in the Frozen Throne she can know when something is wrong and maybe it's not the best time to attack, if you remember when Maiev calls for Malfurion and she comes too, when they debark she says she's not sure about this, going forward or something, can't remember the speech, and only when Malfurion tells her about mountain giants does she actually understand, meaning she wasn't going to try and storm in without at least enough troops, like a brute.
-she then saves the blood elves, also saving her own troops, this shows that she would protect her own with her life where she can
Now the WoW MoP Tyrande:
-knows it's an orc trap, wants to storm in
-knows it's a sacred temple, wants to defile it with battle
-knows many of her would die with such an approach, doesn't care
-knows how to use traps, doesn't use them, lets Varian teach her how to use traps
-knows her people are mostly ranged fighters, wants to storm in in melee
Are you sure it's same Tyrande? I'm not. the MoP Tyrande is a mindless brute while the Warcraft Tyrande is a ferocious leader.
I fear that when we get to Azshara or Argus we'll get the main force being humans actually and with 1-2 night elves and draenei there just so you wouldn't think they're forgatten.