There are many paths to the end goal as far as tuning is concerned. As far as LME's tunes, they have always stated they use & control many more parameters available in the PCM via MyCal than are available to other tuners via devices from SCT, Diablo, etc. If so, those secrets are hardly likely to be discovered through datalogging, because you will see the aggregate effect rather than the discrete. Definitely, a better approximation is possible via datalogging, but not 100%.
Do you guys really think a MyCal device is reverse-engineering proof? A hack-proof device has yet to be invented. So relax, put your feet up, and enjoy the popcorn!