They were not ex-military pilots, they were current military pilots, this was a military a/c. The real problem for polish military pilots is they get very little flying time per year due to funds shortage, but this wouldn't apply to these transport pilots.
If there was no ILS, there are only 2 possibilities, NDB or PAR, as VORs are rather scarce there. PAR more probable due to reports that ATC "commanded" the crew to climb (of course, it might happen also under normal SSR, but it does bear resemblance to PAR), but then, placing of the crash site so far from the expected flight path would be difficult to explain.
BTW, Casa's ATC transcript was not classified. They were published, and CVR from An28 crash (CFIT during training flight) was published likewise. I would assume that if there's nothing really embarassing for the dead VIPs on the CVR (clear instructions to try to land, meaning they killed themselves), it gets published. Whatever you (and we) might think, it's not some third world.
And again, can we finally cut all the nonsense about a/c type and Eastern vs Western? It makes the first P look more like pathetic than professional...