I dont understand the "nothing should change" mind, i think games can always change for the better, if they cannot be perfect, they can be improved. If they are going to change anything is up to them, but its our right to ask for changes, and discuss them. So i would like to read arguments against the changes i mentioned in OP, not "everything is fine", "single games dont need balancing".
Problem is that any large enough group will have different ideas about what should be changed and how. So, if you change the game to cater to the "OMG, Master is too easy! Nerf everything to the ground so that the game feels like Dark Souls to me!" crowd, then there's plenty of other people who will find the game worse now.
(Further complication comes from asking about this on forums, which tend to be the distilled essence of the most extreme opinions - either "Best Game Ever" or "Worst Game Ever". The forum population doesn't come close to representing the "typical player", but rather the six-sigma fanatics.
Personally, I think that's where Fallout 3 went wrong.... they designed Broken Steel by
actually listening to the people whining on the forums. Big mistake, as it screwed up a bunch of stuff.)
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As for Smithing and Stealth.... personally, I didn't find them overpowered (oh, and this was on Adept). But, then, the way I played is different than how other people played. I certainly didn't "gimp" myself or constantly think "oh, I've got to not do this or I'll be OP". I just played the game the way it felt right, and ended up decently challenged all the way into the high 40's. So, in my opinion, I don't see much need to change them.
