Better safe than sorry!
I rather stay in line and wait for the next flight. We better don't import the food problems they have abroad, it would be a desaster.
I also just arrived from Europe, from LHR with BA on a 747. BA is now in terminal A and I was (with priority tags on the baggage) one of the first on the x-ray. I think terminal A is better than terminal E, E has lots of international passengers and very often long lines.

BTW, I like MIA, it's becoming better and better every time I fly.