About Mace: well, to me, he was unconscious when he falled, and therefore he died. When a Jedi falls from a great high, he must be absolutely focused and concentrated on what he is doing and where is he falling - take the AOTC Coruscant chase as an example of that. So, if Mace was even a bit distracted - let alone unconcious - there was no way he could have survived. Maybe GL should have made it more explicit, by either having Anakin cut though his guts with his lightsaber, or showing Mace's fall, or even showing him hitting a huge flying truck as he falled through the window.
One thing that always bothered me about characters falling down on the PT is the recue of Palpatine in ROTS... I mean, ok he was a sith lord and whatever, but he was "supposed" to be this old man with no proper phisical training, could have he done what he did, like falling down from the elevator shaft and getting up unharmed?