You raised a very good issue. How should Christianity evolve in light of what we know about the evolution of humanity and man's gradual acquisition of religion?

Well, firstly, listen to what I'm not saying. I'm not saying that we gut our religions and start over. So, I'm not suggesting that Orthodox Jews, Reform Jews, Muslims, Hindus, Buddhists, etc., ought to meet at a conference with Christians and every other religion to decide what the next human religion should be. The reason is that we ought to believe in godly inspiration within our respective religious tradition, so this is a matter for each religious tradition to address. However, certainly eucemenism should play a very significant role in allowing each tradition to evolve freely within the context of how other religions evolve. This I believe was one of the inspired godly reasons for evangelizing the Gospel, and as many people now realize, this worked in helping to create a religion that bridged Jewish and Pagan beliefs to some degree. Fundamentalists always look upon this as a bad thing, but this is a good thing as long as it happened within the context of the religion's natural development.

In the case of each issue that you raised, I don't think we ought to set any hard and fast rules for a tradition on what they should and shouldn't surrender from their tradition. For example, I don't think we ought to say to Orthodox Jews that the God of the universe being concerned about our haircuts is absurd. The reason is that this haircut might play a very important role in their tradition, and whether the God of the billions and billions of galaxies is concerned about how an advanced primate cuts their hair or not, the tradition itself might need that particular odd tradition in order to develop naturally within its own framework.

This doesn't mean the rest of us should accept the view that haircuts are important to God, but if that becomes a real stumbling block for the continuation of Orthodox Judaism, most likely the religion itself will evolve to avoid its own demise.

I myself would like to see much of that laundry list that you provided changed within Christianity. I belong to a religious tradition within Christianity which is already well on its way toward re-framing many of the items on this list (the United Church of Christ). So, if that's the trend for all of Christendom, then I think that's a very positive trend.

I see that all religions have much that is good within them, but they have been rendered ineffectual due to the archaic notions/customs and superstitions.
Understandably, much of each religions belief structure was put in place due to reasons of social control, as well as keeping various factions appeased over the course of time.

Parallel we see that in parliament they are great for putting new laws on the books, but when the old party is elected out and the new comes in, they do not house clean and remove anything. It just piles up over the decades until there are many laws which are pointless and were only instigated for patronage, but they still are there.
A good house cleaning is in order.
There have been good efforts in the past for diverse religions to come together, but there is still the perennial problem of ego.
Many head clerics of all faiths are not selfless, but have the "I must win/triumph" paradigm sitting foremost in their hearts.
These people are the greatest barrier to any efforts at harmonization of spiritual traditions.