If everything was so well defined and understood as you allege then we should be a lot further along the way, shouldn't we? All of those brains and they can't do a thing with it.<quoted text>
No, it is *very* well defined and *very* well understood. That is how we can be confident that your ravings are wrong.
The cosmological constant is perfectly well able to explain/describe the accelerating expansion. And it isn't like the introduction of a CC is new: it was one of the modifications proposed by Einstein quite early on.
Or nothing at all like that...
You are stuck in an academic/theoretical loop of thinking that has separated you from the more mechanical aspects of physics, meaning the ones technology works on, the stuff that actually works. It is called left field. If and when you get out of that field and out into the productive end of science you will understand that.
You aren't looking at nature, you are playing with math models and not comparing them to "reality".