Not so much wasted space in left-right margins - bigger width
There are HUGE margins to the left and right. The result is that there is tons of wasted space and very less content can be seen on the screen at one time.
Please maximize available screen real estate.
The site already is "variable width" to adjust itself to different window sizes which is good - but make it 90% of the width of the window instead of what it is now which seems something like 70%.