Good flying under the circumstances...
A few things to look at if you're in the same situation:
For the Kuala - there's a perfectly good building top next door at the same height which could have been used to swing the people across to instead of going to the ground and wasting even more time. This seems to be a very nice training exercise in winching where you had the time.
For the 350/355 - try not to have the people rush into the helicopter, this is where it can go wrong quite quickly with weight shifting when you are off the ground. Secondly, most roof tops are sound enough with strong steel beams supporting everything. Use the same techniques used by the powerline workers where the pilot will put one skid on the pylon while the workers climb in/out. This makes it much more stable...
