we have a few problem talents. I really like ice flows but it felt a bit buggy or awkward, so i gave up on it. Blazing speed, temporal shield and ice ward are also lackluster or overly situational at best. Our 90 talents are supposed to address our mana management as well as damage, and they could use some quality of life adjustments, but instead of addressing mana management, they more or less remove it as a mechanic altogether.
Thats not necessarily true though.
Ice Floes has problems, sure, but there is always a case you can make for it. Is it better than Scorch in most situations? No. It could probably do with an extra charge and not consume a charge if you use it with less than .X number of seconds on your cast (I swear I've lost several dozen casts because I hit the button thinkin I was finished with a cast and wasted a charge on what had to have been .1 seconds of a cast. I made a sadface every time).
Blazing Speed is actually a decent choice as its off the GCD so you can use it to get out of the bad quickly. Can you use blink to get out of bad? Sure. However at the same time you use a full gcd in order to do so and you generally end up way farther than you need to go. I've made my case time and time again about Temporal Shield bein amazin with its only problem bein the same "problem" Lightwell had in that you need a little coordination in order to use it right and a lot of people aren't willin to go that extra mile.
As for the level 90 talents? Eh, I kinda see your point there. I played Arcane/Frost in Cataclysm and adored the Arcane spec. Was it easy to learn? Sure, but there were tons of nuances to the spec that someone who didn't care to look for would never have even known existed. In Mists that identity doesn't really exist anymore.
Is that solely on the blame of the level 90 talents? No. Not at all. Blizzard listened to the people who were bad at the spec, but could pull good numbers and tried to make it "harder." The ironic thing is they made it easier, but more difficult to pull high numbers. This would be a good thing, but the difficulty in pullin high numbers is the rng of how many AM procs you get and not in how well you were able to manage mana.
Not much that can be done about it at this point and I will forever shake my fist at all the people who wanted Arcane to change from Cata. Killed my second favorite spec right there.
Luckily Frost is just as fun as ever, actually more fun honestly with the introduction of the bomb and ditchin the need for FoF procs to make Brain Freeze good and removin deep freeze from the rotation. Mmmmm...Frost.