This has got to be the best Skyrim thread ... ever.
I made my second character that I'm playing now pretty OP - but did it knowingly. I had been warned that with smithing and enchanting, you could really make things too easy for you, so I simply didn't do either in my first playthrough - now I kinda wanted to see it for myself.
My sword and board Orc plows through everything with little resistance now. And I'm not even using the berzerker rage anymore. Kinda fun, for a while, but methinks that for my next playthrough, I'll not take any smithing or enchanting perks, and just wear/wield things I find or buy.
When you use crafting skills to it's fullest, you will become OP regardless of difficulty. Is it a problem/issue, no because you can choose to go down that route.