You make some good points but I do want to put out that Aax has a good point re: twf, as the investment in dexterity required to TWF is considerable even for TR builds, which suggests that, for its greater cost, your return on investment for TWFing should be higher when all things are equal. However, its very rare that all things will be equal because different class features will interface better with one of the two styles: As an example, barbarians will almost surely be better off with two-handed after these changes (due to their pre benefits and capstone), while paladins will continue to be better with twf (due to the extra procs of their special attacks, and their added-on-every-hit damage being so very, very high). This is, of course, counterbalanced by how much the BP investment required to twf hurts non-tr'd paladin builds, who need considerable numbers of many statistics. Its ok for the fighting styles to not be exactly equal when everything else is equal, and in fact they shouldn't be due to the 8 build points (1/4 of a 32 pt build) required to be a twf that a thf does not need to invest. This is to say nothing of the to-hit penalty and potential extra feat (otwf) that twfing demands. It -is- the more expensive style.
In the end, though, the class benefits to each will determine what is better, and that will vary per class. Only fighters gain bonuses which are equally good with both styles (since their benefits scale up for thf weaponry to keep it equal), which makes tons of sense in the context that fighters are by far the most logical class to be equally skilled with either style.