I think you should read the 4e EDs, because IMHO you are completely wrong about them.It seems like it, but to do that, I'm pretty sure that you have also epic magic and therefore strange physics. I'm not saying that they are needed, I'm saying that they usually are consequences of epic plots in the D&D universes.
Just as the reverse, it's not because you have epic paths (which actually are totally bland and technical in 4e) that you generate epicness.
Read some of the play descriptions that @pemerton (I'm sure there are others too) have put up describing their Epic Tier play. Its not mundane, bland, or technical at all! This is my experience as well. As @Manbearcat stated the other day here, the way keywords and the thematics of Theme, PP, ED, and even some of the feats and other elements (Artifacts potentially for example) interact, and how they fill out and inform the structures of combat and SCs allows for some really gonzo play. I mean, you have to, as a GM, accept a certain level of player empowered narrative direction here. When the Paladin player SACRIFICES THE HOLY AVENGER to shatter the Chain of Fate, that isn't quite written down someplace, but that is exactly what keywords and the structure are handing you is the way to bring those things to fruition as part of the paradigm of play, and not as something that has to be 'grafted on to make it epic'.