It may (possibly is) just be me, but I think that higher level "intelligent" mobs should get some sort of saving throw against intimidate,both the skill and the actual combat mechanic. Certainly not a blanket immunity to it, but something to add a bit of a difference rather than "have we got the 80+ Intimi tank?/ Let the 70 Str ESoS
Barb beat on Horoth for a minute until he has aggro"
I know we'll probably never see things like the higher intelligence Monsters actually realize it might be better to use their wings and fly around rather than getting beaten on by 10-20 Greensteel weapons, but I like to think that maybe sometimes Horoth (for example) might decide that maybe the guy taunting them from behind the shield and massive DR wall aren't quite as important as the 10 guys beating on his back.
Basiclly I'd just like to see some sort of mechanic that says Maybe he'll keep being intimidated, but there's also a decent chance he'll use his (or her/or it's) massive intelligence to figure out maybe if he throws a maximum empowered disintegrate on one or two other guys attacking him from behind it might slow his attackers down. Or Maybe if he flies off and stomps the arcane running his orthons around, the orthons may actually participate in the fight.
Or maybe if he pays the healers a visit with some maxed out DBF's and Disintegrates , the party might have to adopt different tactics.
Could just be me (and I must admit I do not have an intimidate build) but I'd like to see some sort of challenge from some Mobs that can't really be solved with simply intimidate/gain agrro and kill mob while it pretty much tries to beat on one guy it's not really going to be able to hurt.