Well, for one, we're not really using open Z-Wave, just some minor parts of it.
We don't actually support many of the devices from Fibaro as yet, but the door sensors should work just fine, so I'm not sure what's going on here. Did you upgrade your Almond+ to the latest firmware? We fixed a couple of Z-Wave related bugs in R066.
We'll get support for the rolling shutter in a future firmware, as we actually have one, it just haven't been a priority. The wallplug on the other hand is working just fine, I tested it as recently as last week as in R066 we added support for power monitoring.
The problem is that the Fibaro sensors are a bit awkward to add and remove, as they're way to precise when it comes to pressing the button in sequence. I've had problems with this as well. You need to go into Add sensor in the LCD UI, then Remove and simply just keep pressing the button three times quickly until they're removed. Resetting the Almond+ will not remove sensors and you should not use the remove all option for Z-Wave sensors, as they have to be reset by the gateway/coordinator or you won't be able to pair them again since there's no way to reset a Z-Wave sensors unless it's done from a gateway/coordinator. ZigBee is much better for this, as you can reset a sensor on its own.
As for your other questions, I'm afraid I'm not going to be of much help.