This I didn't know, why don't they unify in some way, even if it's just for unity of the sects that just gives them peace? and why don't they seem to be progressive, like the synod or cardinals in Rome, or for that matter are they?
Long answer to that.
Some of my answers would be historic/factual.
Some of it would be subjective/from experience.
But to most educated Muslims unity is everything and is definitely promoted from both sides.
With regards to being progressive my personal experience is that it is. I can find an answer to daily issues if I require it. I was at some lectures given by a local imam over a month ago who talked about how we should question everything because that is what is said throughout the Quran. He went as far as saying that we should question what certain "leaders" are promoting. Question the Quran. Question Hadith. If it doesn't sit right ask more questions.
It was a series of lectures but a typical example was "what's a disbeliever?" Is it a non Muslim? Is it someone outside the people of the book? Is it someone who doesn't believe in God?
To this he cited several Hadith and also verses from the Quran. Going as far as saying that even someone who didn't believe in God but lived a honest and fair life is God so petty that that person would be punished because they didn't follow islam/christianity/Judaism?
There were lots of examples and even to a non Muslim the philosophical discussions were excellent. This scholar is not a random one off. Pretty much every lecture of sermon I've been to has similar progressive talk.