Calendar events widget like: use organizerfeed.
Calendar events on LPM/standbyscreen: should be possible to do, as simple hacks allow any text/picture up there, perhaps ask the guy who does organizerfeed -- btw you can't possibly consider this a negative versus android - on android, you don't even get a clock when the phone is idle/standby, even if there are plenty of devices with an OLED screen that could easily do it
Clock in standby screen while playing music: perhaps it can be put at the top, as on the home screens?
Disable weather widget: just deinstall the related program (accuweather?)

Ovi maps slow? perhaps your phone has to load huge map data? Google maps is just tiles being displayed; and downloaded if the phone didn't have them yet. Useless abroad in many cases.
I find Ovi maps quite ok, it's slow to start, but after that it's quite fine.


As for your other points, I agree to them or don't have experience there.