As I understand it, the problem is that there isn't any usuable data to show. CMx1 had internal data that was directly useful to the player: firepower as a function of distance, percentage cover, penetration chance. CMx2 data is lower level. For a gun AP round aimed at an AFV the game might (for example) pick an aim point, add in a 2d gaussion random offset to model shot distribution, calculate the trajectory of the shot based on that, determine the first intersection of the shot (which may be the ground for a hull down tank); if it has hit a vehicle, determine which poly was hit, find the composition of the vehicle in that spot, determine angle of incidence, look up penetration data to determine possible outcomes, determine trajectory of shot after exiting / richochet from the armour layer, risnce and repeat with the next thing that is hit and/or work out behind armour effects and flaking. There may or may not be special cases for weak points / shot traps depending on how precise the vehicle models are.
Now the actual data you have in the engine might be the shot distribution 2-d gaussion and the penetration tables for each poly of the vehicle armour which aren't actually a great deal of use to the player as they stand. Compositing them in to some kind of accurate number is a no-trivial feat and comptuationally not cheap to do, and CMx2 is already quite a processor hog. And doing it fast and cheap is likely to simply be wrong in at least some cases (which will then be found on the forums and discussed endlessly as evidence of BC malfeasance
) .
No doubt there is some sensible compromise that would give players some rough idea of weapon capabilities, but the point is that the player isn't getting to see the raw data regardless. You are at best going to see numbers that are derived from the raw data, and derived in a different way to how the data are actually used in the game. So in that sense, you still don't get a handle on what the game is
actually doing. You get a different version that hopefully correlates to the game fairly well, and will probably fail spectacularly once or twice until the glitches are smoothed out.