Nagging movie questions.......

....Okay first let me say I enjoy the movie and I have been a TF fan since 1984. I was over at a friend's house last night who is not a TF fan, but there was nothing on and since he knows I love TF's we ended up stopping on the movie. He had several questions that I really had no good answers for.
Why does being put on ice shut them down when they can travel through the icy depts of deep space unprotected? Also the intense heat of entering the atmosphere doesn't seen to harm them but the high heat ammo does?
Frenzy gets decapitated but is hardly even slowed down, but Jazz gets torn in half and dies. Also the Allspark completely regenerates Frenzy, why doesn't BB use it to repair his legs in the final battle.
In the final battle everyone seems to agree that it's a great idea to get the Allspark loaded onto a helicopter, why? The Decepticons have air superiority. Won't they just take out the heli and pick the Allspark out of the rubble?
Why does Megs navigation system come online and react to A. Witwicky the way it does?
Lastly why is the Allspark destroyed by loading it into a TF's spark? I can see why it destroyes the TF, the raw power must overload and destroy the spark, although this does tend to contradict the way it healed Frenzy. I don't see why the Allspark would be destroyed in this process though.
I hate to nitpick, and like I said earlier I do enjoy the movie for what it is, but it seems when people who aren't wrapped up in the fact that this is the live action TF movie we've always wanted to see watch the film they tend to have a lot of questions.
Why does being put on ice shut them down when they can travel through the icy depts of deep space unprotected? Also the intense heat of entering the atmosphere doesn't seen to harm them but the high heat ammo does?
Frenzy gets decapitated but is hardly even slowed down, but Jazz gets torn in half and dies. Also the Allspark completely regenerates Frenzy, why doesn't BB use it to repair his legs in the final battle.
In the final battle everyone seems to agree that it's a great idea to get the Allspark loaded onto a helicopter, why? The Decepticons have air superiority. Won't they just take out the heli and pick the Allspark out of the rubble?
Why does Megs navigation system come online and react to A. Witwicky the way it does?
Lastly why is the Allspark destroyed by loading it into a TF's spark? I can see why it destroyes the TF, the raw power must overload and destroy the spark, although this does tend to contradict the way it healed Frenzy. I don't see why the Allspark would be destroyed in this process though.
I hate to nitpick, and like I said earlier I do enjoy the movie for what it is, but it seems when people who aren't wrapped up in the fact that this is the live action TF movie we've always wanted to see watch the film they tend to have a lot of questions.