And there goes both your credibility and your point: the complaints are that destruction is broken on its own (with utility/defensive trees). Yes, you can use conjuration, we know that. Now try it with no summon on master difficulty and come back to tell us how that went.
Inbefore "lol use all your magic!". People want to play a nuker type character, not a summoner. Having Atronachs completely changes the gameplay. Especially when they do more damage then your spells.
Also, keep in mind that the main problem is one of scaling. Naturally, you are at the very beggining of that problematic area (lvl 40+), so it is normal that you dont see much impact of it. YET. <--- keyword.
Lol... my "credibility" is gone because I summon atronachs in a video game? I don't always have one, but it makes things easier. I can kill things fine without the atronach, i use it mostly to tank because I can't take many hits. They don't do more damage than my spells.
In my mind a "nuker" mage
is a mage that needs a tank. I think it would be weird to be in a robe casting nukes while a bunch of guys are pounding on you with axes. And I think I probably could have more defense if I wore heavy armor and put more points into health... I don't think that has anything to do with Destruction. If I was an archer or axe wielder wearing a robe with low health, I'd have the same problems. Obviously if you choose to wear a robe and not have any help in fights, you will be in danger, but that has nothing to do with Destruction itself. Is that the main complaint, that it's hard to tank if you put all of your skill points in destruction and don't wear any armor?
I guess if you say 42 is just the beginning of where things get hard I'll have to see. People told me that things got hard at 20 and then when I hit 20 I saw people saying it got hard at 30, and then at 40, and now that I'm 42 it sounds like you're saying it will be hard at 50. I think if I came back and said it still seemed fine, someone would say that it gets hard at 60.