You have an easy to read style of writing. Its good for me to notice these things so I can improve my own!
The ‘Dark matter or Energy’ thing is a very interesting concept.
I prefer the model proposed by the Electric Universe people.
It makes total sense to me but I know that lots of people make lots of money doing research, which is at odds with the Electric Universe model. So I don’t expect the main stream to agree with it any time soon. But it is well worth a look, there are lots of their videos on youtube : ) I think you would enjoy it