I'll be honest I haven't read all five pages but here's the gist:
Anyway the point is if you think you can get by using only one skill you're being extremely over optimistic. A guy in the IGN live stream used Ebonyskin (Alteration I assume) with a perk that granted 3x magic multiplier giving him 300 armour rating. With this and double destruction magic you shouldn't be having any real problems unless you're doing something wrong.
No one wants to get by on destruction alone. I don't think a single person here has made that argument, and if they have, it is misguided.
The problem is that destruction is a combat skill, it is not supposed to be a supplement skill. People expect it to be a combat skill, and they have every right to. The destruction school holds all of the classic pop-culture wizard spells. It should be the bread-and-butter of wizardry. Instead, it becomes largely useless as anything more than a pea-shooter after level 40.
No one expects a one-handed warrior to be forced to raise another combat skill to get by. Yes, he will use other skills (block, enchanting, etc), but he is, at the end of the day, a one handed warrior and can get by that way.
No one expects a two-handed warrior to be forced to raise another combat skill to get by. Again, he may use other skills, but he can get by with two-handed as his only combat skill and he will do fine.
No one expects a conjuror to be forced to raise another combat skill to get by. Yet again, he may use other skills, but he can get by just fine letting his familiar do the fighting for him.
The same goes for archer and thief.
I don't understand why it is unreasonable to expect destruction to carry the same weight as a combat skill as one-handed, two-handed, or conjuration. Destruction PALES in comparison to these other combat skills in its ability to scale properly, and becomes a second rate backup after level 40.
When people say they want to be a "one-handed warrior", they don't mean they want to use that skill and that skill only.
When people say they want to be an "archer", they also don't mean they only want to use that one skill.
But for some reason, people seem to think that when people say that they want to be a "Mage focusing on Destruction", that is the only skill they want to use. Those people ARE using other skills...in fact they are required to fall-back on them, because destruction becomes damn near useless later in the game. It simply does not scale, so a "mage focusing on destruction" slowly is forced to become a "mage focused on conjuration" or a "mage that uses a sword".
A lot of people expected to be able to use destruction spells in the same way they would use one-handed, two-handed or archery. It is supposed to be the primary combat skill for mages, and it easily could be if it scaled a little better.
It is a quick and simple fix to get it to the point where this skill would be useful again, in the way that people expect it to be. It is a fix that wouldn't impose on the playstyle of anyone who isn't bothered by this shortcoming. I don't understand why people appear to be getting deeply and personally offended by this.