yeah that is how the inside of the box is, mine was like that too... and yeah Tamiya pinions don't really wear out as such... they kinda... dissolve...
mine's been painted as the instructions but is flip/chameleon green and purple instead or black/red - had it painted by a professional painter
and yeah two sets of tranny/transfer case gears!
liked how it didn't have the divider as It didn't stay a kit for long... mine got 5 channel radio (Planet T5) and TITANIUM geared servos
the standard wheels aren't that bad to run on, but with the 19 tooth pinions, it is faster than my TXT-1, but the TXT-1 size wheels are an improvement as the Agrios wheels do not have the luxury of helping the suspension out with bumps
and I do have TXT-1 wheels coming for it, but spent enough on it atm...
and yeah it's an easier build than the TXT-1....