I've been seeing a lot of complaining about Belle, steep learning curve, missing home screen functions, losing stuff during the update and having to re-install, etc. So is it worth upgrade?

I also have some specific questions.
Does the music player display lyrics (like the 5800)?

Does the music player have an EQ for manual adjustment and creating custom presets (also available on the old 5800)?

Those 2 missing features erk me to no end (mainy the missing EQ)! If they put them back, that alone would make it worthwhile for me.

I've read that camera quality may be slightly less, but battery life is slighly better. Any other performance differences (RF, WiFi reception, audio quality, etc.)?