DAISYDISK  So far we avoided dealing with snapshots as these often take hundreds of megabytes of disk space. Unlike some competing products DaisyDisk never fills your drives with garbage…

From another point we do understand this feature may be useful, so we'll try some options in experimental builds. If they prove being effective, then comparison feature may be added to DaisyDisk as an option. But that's all after version 1.5 we're working on now.  
(Version 1.3.5)

DAISYDISK  Greetings, Don

I'm Taras, user interface specialist behind DaisyDisk.

There're definitely some usability issues related to "smaller files…". They're not perfect, but proved being a very effective way of reducing information noise. In practice dealing with this item, representing collections of small or equally sized objects is often useless because it requires too much micromanagement (example: a set of 1000 photos plus some icons and text files) we're trying to avoid. It also mostly distracts one from the main goal: free up some space (not "just wipe out files I don't realy need"). Make sure I'll recall this question the next time we start the next big round of sunburst improvements ;)

And don't forget that DaisyDisk is not a file manager and has never been positioned as such.   
(Version 1.3.4)

DAISYDISK  Greetings, DRDUL.

Direct file deletion is planned. As you may notice, it's not easy to make file deletion easy and comfortable for all situations from local files to remote servers without giving one a perfect "mess my data" tool (error-proof is one of such). We think we have a good solution and it will definitely appear in future versions.

We've already thought of some further display optimizations. If our experiments succeed, you'll see some of these changes in the nearest future. We usually tweak map display a little each release :)

As for font size, feel free to tell us more about the issue. Write to support and I'll definitely pay close attention to this problem.  
(Version 1.3.3)

DAISYDISK  GRYFFIN, feel free to report about any crashes you notice.  
(Version 1.2)