To a degree, I can understand Pipuli's reasons. I've recently moved from a file-tree based mp3 player to the tag-based world of iPod. In general, if you're searching for a specific song, tag browsing is great. BUT... if you're used to having large multi-artist playlist... the tag based approach is *very* frustrating, as youi only get the song name.
As a work around, you could use re-tagging software to rename ALL "Song Names" to "Artist - Song", and this gives you the ability to see properly what goes on in playlists.
It's a major gripe I have with how the iPod handles playlist. It would be soooo simple for apple to tweak the firmware to improve playlist capabilities. Oh well.
If you want further guidance on re-tagging, let me know.