It's a shame this had to happen now that ZRH uses stereo de-icing from mobile trucks. This is the fastest de-icing method - pioneered in CPH and heaps better than expensive rigs - which use type 1 fluid (and only spray from above).
Every airline should have a written checklist for being deiced, however. Things like putting back on the air conditioning systems and rechecking stab, flap settings for T/O as well as checking ALL CLEAR before taxying wouldn't then get missed.
In CPH the de-icer used to inform the crew via VHF of type of de-icing - time of starting and completion - also when all clear to taxy on. Ground crews live a dangerous life and we should be very aware of their presence round our aircraft.