expect the most experienced game design team with a proven track record of increasing the game's popularity to try and fix it. But again, it might not be fixed for your table. It will be fixed for many other tables. That is the crux of this problem. You want a game designed for you and a handful of other people that perceive a problem. Yet, there is never really any evidence. It's anecdotal, which for the record, in my book counts. But it counts for your table.
And if the inexperienced DM does encounter the problem of having a 20th level fighter not be able to compete with the caster class using non-magical feats and powers, then they are similar to your table. Maybe you should get together. Maybe you and others should post fixes or an expansion after the new core books come out. But what you should not do is insist that the game designers can't do it.