Hi, u have only stated 3 things:
1. a known bug and only occurs on few machines, this is an upstream bug and not openSUSE's fault and openSUSE devs r themselves working on it to fix it.
2. Another upstream bug that has been fixed in kde 4.1 and is being back ported to 4.0 by Novell and back porting takes time.
3. The dash board isn't a bug, this is a feature thats still in development so its supposed to be like this.
They couldn't fix all of them but many have been fixed for example opensuse's konqueror in kde4 is the only kde distro which has got flash to work on konqueror and thats a feature Novell added themselves cause the upstream konqueror doesn't support flash yet.
Both these problems u complained r of r known and a fix should be release. Gnome is very stable and only has one issue with pulse audio that is being worked on right now and kde 3.5.9 is 100% stable so I suggest either stay with kde 4 for now cause it WILL get fixed, don't worry or go to kde 3.5.9 cause its awesome as well.
Trust me, their kde 4 is the best, I tried Fedora and it would crash and restart xserver every hour and kubuntu. well u know how kubuntu is.
You might have found that many bugs have actually been fixed and this problem about the panel is that kde 4 doesn't support moving plasma applets on the panel, this is a back ported feature and isn't working well cause it was supposed to be for kde 4.1.x but isn't working 100% correctly on 4.0.4.
Edit
To go back to the default setup for now rename the .kde4 directory, its a hidden file and u can rename it to .kde4old