I don't see that as a flaw. Yes it can be accomplished but you don't have to play that way. Nobody forced you to utilize enchanting in that fashion, you choose to do it. Bethesda's games have always allowed the player to become god like if they so choose. I personally decided not to go that far with it and my character feels well balanced. But if I want to play that way at some point when I'm bored and just want to be invincible, I have that option as well. It gives the player more freedom so I don't see it as a flaw as much as a choice.
And regardless of any perceived or actual flaws in the game I would still buy it again without a second thought. It is an amazing game as a whole and there are no flaws in it that would keep me from enjoying it again and again. Modded it will be even more fun. I look forward to when that day comes too.
The concept of "choosing" character progression limits completely destroys progression itself. If I play to the best of my abilities, and I derive enjoyment fromrising to a challenge, then it is a huge flaw to have a system which allows me to "break" combat so easily without even exploiting. I acknowledged that this has always been a part of TES games, I don't know why you chose to repeat that to me- that doesn't mean it's not a flaw. Which, as we circle back around, is why it's perfectly reasonable to judge the game based on that, and not say "oh that's just the player's fault for choosing . . ."
A game is a system with a set of rules, if one is forced to cripple one's performance/choices to maintain game balance, the game ceases to be entertaining, as this effectively means character progression must halt. Yes, this is an RPG, but RPGs have also always involved character development as a core feature, alongside the immersion of roleplaying and whatnot.