I read WPMU might be merging and so I have no idea how themes might be managed in the future but two suggestions:
• in Site Admin > Themes >
It needs a single, simple radio button at the top to 'select/deselect all themes'. I just added 100 themes ... why does every WPadmin have to manually selection all themes individually?
• in Appearance > Themes >
does this not need re-designed or is there a plugin to do it?
For examples,
a Lightbox style presentation that shows scrolling single theme screenshots?
a simple, single line list with smaller thumbs that uses a rollover effect to show a bigger preview?
• in Appearances > Themes >
Defining themes via a 'Search', 'Categories', e.g. single column, double column, color or search as per plugins, e.g. status as active, disabled, upgrade available.
I love Wordpress but, historically, it has always had this thing of making items in the Admin section REALLY BIG and simple (in a negative way) looking. I would prefer it to be simple but more condensed, using a single, even, typography ... and with less page clicking. I just don't think there is a need for the BIG blocks given over to theme designs.
• Screenshots
Just as a grumble aside ... why do some designers never seem to optimize their screenshots for web use? I have seen some up using .pngs at around 250k when they could be 25k or less. Do the arithmetics ...