I'm going to go out on a limb here and say that this may have been the only one they could acquire rights to and get the tapes for. It looks like most of the other key Herbie albums are being released on trusted labels including BN Tone Poet and Music Matters. Perhaps there are upcoming releases we don't know about.
While I fully understand the frustration around this pick (and I too am disappointed), it's definitely not the worst pick they've made for Classics and if it gets the full AAA treatment, will likely sound pretty darn good. I'm tempted to swap this one but not nearly as tempted or determined to swap as some of the last few. To me, Fania and Lloyd Miller were the worst but that's just my opinion.
I think we would all be more okay with this if swaps had better options and worked properly (including changing your swap if needed)