@DaveP
The site has been up for about a month. Many people are working in the background to help further it to be more of a working standard.
Yes all would agree MUI isn't great and in time when there's a working port of something along the lines of GTK I'm sure it will be replaced.
However for now what was chosen WAS the most vender nuetral API. Like it or not a MUI based program CAN run on each OS. Does that make MUI the best no but noone claimed otherwise.
As for syntax's etc. Give it some time while that is being worked out. I'm sure if anyone wants to help out instead of complaining noone is stopping them.