To understand why you can't do that, you need to understand how the track system works.
A track does not record the aircraft's position in 3D space - it records a small number of inputs and events and makes the game engine reconstruct them.
This works fine, allows for small recorded flights (compared to, say, avi files . . . which are huge), and on the same version of Lomac is fine.
If you change the game engine, even slightly . . . . then the same inputs do not result in the track playing back the same way.
It's not fixable without spending some serious time doing so - I'm not even sure if anyone's suggested a way to do it.
It sucks that they don't have time to record the tracks themselves, but IMO I'd rather ED spent their time introducing new features. The tracks work with v1.1 and they provide a rollback utility - that is more than we've ever had with any ED patch to a sim.
And if they're working on a new patch again, which will break the tracks again . . . . . why re-record for v1.11 when you need to do it all over again for v1.12?
What ideally needs to be done is a number of generous-minded and competent community members and a download site to band together and create voiceover packs for the new patches. If one community member good at one thing re-records the original tracks with voiceover and emails them in, in a week or so you have a new, voiceover, training pack.
Job done.
VVS504, S77th and the 169th would seem the right places to start asking for competent training officers.