2) Another thread of mine gives a suggestion to make combat faster by trading hp for attack bonuses and damage bonuses. Another option to speed up combat is the fair use of minions. In general, I don't think that the people who don't optimize are the reason the combat system "lags". A reason is the fact that non-optimizers have the right to play dnd as well as optimizers and to have about the same amount of fun. The other reason is that balance exists imho mostly in order to help the non-optimizers and not the optimizers.
3) Indeed. However, using the character builder by both optimizers and non-optimizers helps to close the gap between them because it makes optimization really much easier for the non-optimizers. But I am here to help mostly people who do not have access to character builder or who prefer more traditional ways to build their character, like me.
About your suggestion, it is good and I will not deny that, but I prefer mine because when you free Feat slots, without limiting the power of the Feats themselves, the extra free Feat slots are going to be used for more optimization, more min-maxing, more power building and not for e.g. Linguist. As for the items, I also prefer the Inherent bonuses, that you mentioned, of the DM's Guide 2 (iirc). The only thing I find a little bit strange in your advice is the elimination of feat and item bonuses to damage. Wouldn't that drag out the combat even longer?
Still, I really thanks both for your reply and your advice. :)