Well, my own opinion is that people are really making "mundanes" sound a lot worse off than they really are, in my experience anyway. I played a rogue/fighter for years, with a heavy rogue lean, and am playing a rogue/fighter now with a heavy fighter lean. I'm also playing a ranger, bard, paladin and wizard; all of them between 12-17, just to point out that I have experience with many of these classes for my own comparison.
The idea that a rogue/fighter is obsolete kinda tickles me. I've never felt, and currently don't either, handicapped compared to other classes I'm playing. Each of them has their own strengths, and the draw of a rogue/fighter that I have and always will love is their ability to do almost everything and not be absolutely screwed if/when they find themselves with no magic ready or wards in place. Also, someone mentioned the other day that locks and traps are better handled by a wizard, but only a rogue can disable traps above DC 35, of which there are many.
UMD checks are higher, but not impossible. Scrolls are more expensive which stinks, but I've made my point on discord at least that I think circle 3 and lower should be standardized a bit lower while higher level scrolls don't necessarily need to be cheap. They don't absolutely -need- them, however, they are simply augmented by them. I can't begin to guess at how many millions or tens of millions I spent on scrolls on mine, which imo is a good thing - it was one hell of a gold sink. If the idea is to keep the gold sink while preventing someone from obtaining bags of scrolls then fine. Personally, I feel that will simply polarize things where anyone capable will continue to do so while others will struggle just to have a few. Probably not the intended effect but one I think will occur.
Regardless, a good rogue/fighter in a group can put wards to exceptional use. It's a build that takes a little more time than others to reach it's full potential, especially with a heavy rogue leaning, but I've gotten to level 20 and never felt an ounce of remorse at having played the combo. Currently even on my new one at lower levels I'm finding them to be stronger than I remember.
Dex modifier adding STR would be OP as hell, but as I understand it that's not even up for discussion due to system limitations. While I don't feel anything really -needs- to be done for rogues, if anything were I think giving them more feats would be a viable option. Something I've argued against in the past, simply because I feel like the trade off for taking rogue levels is gaining a huge number of skill points and not having to cross train almost anything, but lacking in the feats department. A balance that seems fair and works to me. If, however, people are so certain that rogues need love - more feats would help. It would mean they could take more saving throw feats more easily, or more skill focuses, or pick from any of the newer mutli-class feats of which many would help a rogue or a fighter a great deal considering Will is a glaring weakness in both classes.
Giving fighters more skill points and/or adding some skills to their class list could help them also. Both options work within the fact that they are combat system oriented, which can't be altered because game engine, while giving them some increase in power. Which again, I think is being overstated by many, but those would be doable.