I have a two weapon fighting pally/rogue 18/2 Dwarf with the Constitution for damage on war hammers. I just got him to lvl 28. He is pretty fun to play currently. I also have a two weapon fighting ranger/rogue 18/2 Drow who has been lvl 28 for a while. Scimatars with dex damage. My ranger does noticeable more damage than my pally. Not insanely higher but 20 or 30 more damage per hit. They both equip almost the same gear. But being a tempest ranger with Many Cuts and Dance of Death, I can bring up that damage even more. It is a nice increase but not insane either. My pally gets the cleaves of course which are fun.
I want to say that I don't understand why you would take away the benefit of holy sword to my pally if my ranger, who does not have holy sword, does more damage already. But then on top of that, all my two weapon feats will not increase my damage any more? I don't see myself even remotely as a min/max type player but play character that sound interesting and fun to me. And now my light armor characters are going to take more damage during the fight which they will not kill as quick as they use to?
My 28 dwarven axe and shield dwarf pally is a blast to play. Full plate and he is currently lvl 9 on his 3rd life. Not once have a played him and thought he should have the dps of my duel wielders. Since holy sword became useful, I haven't complained about his dps at all. It might take him a bit longer to kill but he will kill them without having to run away and heal. He is a lot more group worthy and does quite well at keeping aggro off squishy casters. I also have a blade master pally carrying a great sword. Fun and awesome dps but the whole robot thing isn't really for me so he has been hanging at lvl 20 for a long time.
My first character was a lvl 20 fighter many years ago. He was ok to level but his lack of healing made him not much fun. He was full plate and sword and board. In fact, that character is my 18/2 ranger/rogue now. I know fighters don't have and shouldn't have a lay on hands ability but maybe something along the lines of an enhancement or feat that makes healing potions heal for 300%? That would get me interested in a fighter again. But killing two weapon fighting is not going to make me interested in playing anything.
Without pvp I have to ask what this big deal is about balance? I am well aware casters do a ton of damage more than melee. But that's the great thing about it. Variety. If all characters types equaled the same damage/survivability then why would I create a different character ever?