The aircraft should not accelerate above 250kts below 10000' in VNAV if you have that speed restriction entered on the Climb page. (SPD Trans/SPD Restr).   
The FMC Legs page should not show a speed higher than 250/10000'.
The speeds on the legs page are wrong below 10000'.
One waypoint has a speed restriction on the arrival of 210/5000. The next waypoint is showing 307 kts etc.

Secondly when going direct to a waypoint with a speed restriction on the FMC Legs page,  the Captain Sim 757/767 immediately decelerates/accelerate to that speed irrespective of the distance to that waypoint. Also not correct.

I also notice when selecting an STAR on the arrival page on the FMC the first waypoint seems to missing from the STAR.
Tried a few airports and several different STARS, first waypoint was always missing on my system. Newest Airac installed from Navigraph.

LNAV is also a bit inaccurate. Has a tendency to turn early and undershoot the turn on an SID etc. Resulting in left and right turn oscillations.

I see the 757 got the same speed issues etc. Been reported numerous times. Bit surprised this had not been addressed. 

Offset capability?
FMC ALTN page?
FMC COMM page?
RNP Entry?
EICARS, for weather/atis uplinks etc?

Would be nice if Captain sim also incorporated an IPAD/TABLET on the window bracket for performance calculations and charts etc.
Most serious developers seems to be adding this feature nowdays :).

Chris