Choices do impact what you have to go to war with and they do impact how Earth makes out (if it does at all) and what becomes of Shepard. The three choices on solving the Reaper threat are very different outcomes but sure, I'm for the fixing of plot holes and addition & clarification about the aftermath of those endings would be great. In Deus Ex, you got a short cutscene that at least showed a glimpse of what your choice means. The last cutscene communicates nothing about that, that's true.
I don't agree that ME3 subverts the idea of diversity at all. The root cause of that complaint reinforces my criticism; the "problem" is compromise rather than a rejection of what Shepard believes in or what the message of the game is.
It was made very clear time and again how uncompromising the Reapers were. If more freedom means Paragon Shepard ultimately being able to talk them down or something, I'd rather not have it, even under very strict conditions.
If the "new ending" means there's MORE of an ending, then great. I'm not against that. I'm just saying that's all it should be because the plot of this game is hardly so off course that it demands a fundamental rewrite.
I would suggest that it's not the medium, but the quality of perception and expression, that determines the significance of art. But what would a cartoonist know? -Bill Watterson