Great music but unbalanced original recording

This is a musical gem, directly rescued from a drawer labelled "underrated talent". The tunes are tricky and virtously played, and the improvisations are great, given the treacherous changes that have to be mastered. It is a pity that the recording is so unbalanced. The piano sounds remote and much too soft, and the tenor sax appears to be off mike at times. The only instruments that sound as they should are bass and drums, the latter sometimes leaping at the listener. What did those radio recording engineers do at that time? Sleep while working? Sit on their ears? The folks at HDTT obviously did their best to get the best out of the original tape, that is clear. Especially the background is very quiet and the stage is fairly wide. But unfortunately this is not enough to compensate for the missing quality of the recording. Too bad!