I didn't made my self clear, which was my bad, but my overall post wasn't targeted to your points (though not specifying anything about ms or etc.) but as a general objective opinion outside of your discussions and from the point of view of us as staff, related to any character discussions/topics. I do stated however that we take things as feedback, and while I didn't said it is bad or good (speaking about MS), I also said that we're not touching chars during ongoing editions, but that doesn't mean it won't be noted for future.
Again, you're speaking strictly from your point of view as a SMG, while agi does of course benefit you, let's think about the VRF then, where agility barely helps him at all (speed is useless for VRF due to CD on chain drive) and the amount of def gained is just like the AE, very low. DDI is usually the main thing that can keep them alive in fights (yea, they have high hp pool, but on 1v1 as I stated previously, once the sd is gone health is barely helping you to survive few more attacks, taking into account that most classes have up to 180% damage vs RF).
You speak about damage as it's something overlooked, but you forget that your entire damage is also amplified with different things (main thing to look out is up to 18% from resets, just as pure damage, excepting extra points), then you have chars that does have % rise of damage from weapons, that again benefit much more from damage. Then you have full socketed weapons that brings in another extra % damages, not speaking about ancient sets with DD or % damage increase. The buff from 55% to 60% of DDI is a minor one compared to an 18% increase in damage just from resets. And even there, how many ppl does achieve that max dd%? It's not something easily achievable, at least not for everyone and not that fast (looking to newbies/late comers).
There are enough methods to counter AE's thing in CC, starting from chasing her since start (you know which one is elf, due to bow) and burst her down on start, being in her range when she starts ice-ing you, up to indirect methods like letting her die to mobs/other ranged players from CC. It's not something that grants her a 100% win, but the only thing that gives skilled elves a chance to win the CC on their own power (how many AE's does even know to play with ice, 4, 5?).
I didn't wanted to give playing advice at all, everyone should play his own game and find the best solutions, but I can't keep my mouth, because you're assuming things without even testing before, JUST take 10 minutes from your time, go on test server, put 20 points in ice resistance on skill tree and then try to hit yourself with an AE ice arrow, then you'll maybe understand what Ice resistance truly means and will stop telling that there are no counters. Want to counter AE, sure, you'll lose 20 points for them, but you will be almost safe. Let's test before writing or complaining, you have all the tools you need to test anything in few minutes, only use few commands and you have everything you need, then we can speak on the same subject knowing most of things that game offers, not just by speculating.