I think that both sides have a point but none is entirely correct.
As you know last ES games were easily breakable. You could get "100% chameleon", invisibility, you could use "dmg strength 100" or "dmg intelligence 100" in morrowind which would grant you a win in every battle, you could levitate when you were having problems, 100% resist magic or reflect or absorption, weakness to magic in oblivion.... well too many ways to break the game.
However there's a difference between those and what happens in skyrim. Skyrim is breakable but not even as much as the other two, however, you can break it without exploiting anything. You just need to train your normal skills and after that, not even master difficulty helps.
What some people have been proposing is that you should handicap yourself to make the game more challenging. Well, I find their point correct when it comes to those exploits like "100% chameleon" or "dmg strength 100", but with regard to stop using your best weapon and start using iron swords to beat the enemies I consider that ridiculous.
I think things should go back as they were in other ES games. You can break the game if you exploit some of its nuances but if you play normally the game is reasonably well balanced
