I just watched your video.
Most of your points are up to your personal taste, which is alright of cource and up to you.
I like the new shadows, i like the new dock (and the new 2D Dock btw.) and i personally love Stacks ... (i use grid-view for my applications-folder). Though of course scrolling in stacks, would be great, i don't see a huge disappointment in the fact that (at least at the moment) scrolling is not possible. And well ... i definitely won't say 'Stacks are useless' just because of this.
On my Macs (new iMac, old iBook G4 1GHz) Leopard is way faster than Tiger. And even on my old iBook it has no problems when i drag a finder window quickly ... or whatever.
So, for me the missing ability to use time machine with network-HDDs is a disappointment, but mostly everything else in Leopard is working great ... at least for me ... and i definitely haven't regret to upgrade to 10.5 ... yet 🙂