It's actually quite encouraging to hear people finding the format and overall approach a good match to AAMC, but saying that "FLE #X" was a little to heavy on biochem, and "FLE #Y" was too heavy on ochem. That's actually what our curriculum team intended, as it helps replicate the experience most students have on test day. If you talk to students who return from the real MCAT, especially across multiple administrations, it seems like there is almost universally some "idiosyncrasy" for each AAMC exam form: "That CP section had a ton of calculations..." or "What the heck? My CP section had way more ochem than the AAMC practice exams."
The funny thing is that I've heard almost exact opposites for all of these trends. One person says their CP section "had almost no physics" and then the very next administration someone will complain that there were way MORE physics than expected. Same goes for calculations, biochem, etc.
I think this has a lot to do with the fact that the AAMC has stated that they match the topic distributions plus/minus 5%. So, for example, on a CP section ochem is supposed to be 15% of all questions, but could be as little as 10%, or as much as 20% and still be WITHIN the AAMC'parametersrs. Physics is supposed to be 25%, but could be as little as 20% or as much as 30%. I'll bet most students will "feel" a big difference between a test with 10% ochem and one with 20% ochem.
I tell all my students to expect the unexpected. Your exam could seem heavier on any particular subject, so just be prepared for that fact and don't let it surprise you on test day.