Sorry no, that is a severe case of a personal issue lacking any self-control in maintaining one's roleplay, because the game does not whatsoever motivate anyone to respec throughout the course of the story, especially so excessively. I can't even begin to fathom someone playing like that.
Why then limit saving in the honour mode, you can equally say that the save scamming is only an issue of someone lacking any self-control.
Because Honour mode mimics a real campaign. It's not about self control, it's because your DM rolls with your decisions.
Respec and the magic mirror, on the other hand, are quality of life features. They're in the game as a separate layer to increase the player base. Having one misclick haunt you forever can be funny when you accidentally turn all of Moonrise towers hostile, but it just sucks if you gimp your build.
If you don't like these features, don't use them. Eventually, you'll stop thinking about them. Yes, they break immersion and suspension of disbelief. It's still better than removing them, though.
The invisible 5000 pound bear strat still works in Honor mode. Respec is really one of the least cheesy mechanics. Taking it out will make some multiclass builds come online closer to level 9-10, and therefore less often used, but that's it consequence wise. It doesn't actually increase balance.
