Detail Listings - Improvement Suggestions

I have a few improvement suggestions for detail listings:

1) Customize Tabs (e.g. with Icon or color)

2) Either show the number of items for every tab directly or don't show it at all, showing it after clicking the tab is kind of useless in my opinion

3) Configure detail listings like this...

...instead of this:

In my case I want detail listings always on but don't want the options in the task pane as they are taking usefull space there..

4) Save selected columns, cause atm it is always reset to default (Name, Filesize, Change Date)

Thanks for considering!