No, customizing should only be a temporary status, when its done it should have the status "Ready".
The error means that there is no desktops available and that is the problem here since they are all stuck in customizing.
On Q3, well not really any realistic ones, why would you not want DHCP?
You need to figure out why it get stuck in customizing:
does it get an IP?
Does it create a computer account in the AD?
Does it have the correct rights to join the AD?
Check the logfiles on the connection broker, view composer server and the View Desktop for any error.
// Linjo