No Heavy/Operative love especially the Heavy as I barely see him anywhere but otherwise great.
They could probably release this level as a standalone game by the amount of time spent on it:D
It's logical to make one map to test basic game mechanics. (Thinking about the HUD, bullet damage, smooth movement, SMART,...)
When they have one 'full' level, they can start to test things, instead of testing in simplified environments.
When all of this has been done and when there are more maps and more stuff finished they start to balance things.
It's a logical process in developing.