Noted, can you not get Dawn to be native to the 1A as opposed to mimicking the 1Z? Is valid as many of us bought the 1A for it's signature not the 1Z's. Personally I don't agree with the Inferior comment as 1A & 1Z are targeted at differing audiences.We can't run the Z1 FW on the 1A/Z, so Dawn will still be based on the 1A/Z FW.
The next Dawn (as part of the Walkman One firmware) will be similar to Midnight v2 for 1A - that means that on 1A it will sound very very similar to how 1Z will sound with Dawn.
Walkman One will have the 1Z sound signature available, so it will basically be the stock 1Z firmware with all the additional options. By default, this unreleased FW will have all additional settings in the settings file not enabled (DIM=0, Normal mode by default, etc.). The 1A sound signature is just made inferior by Sony, like the A50 sound vs the 1Z sound, for example - the A50 can sound a lot better, but it's made not to.
The WM1A is inferior to your taste, not the DAP's competency, if it has fault's I've yet to find. WM1Z pushes lows & highs, WM1A focusses on the mid's similar to A&K with Sony's flavour. For some an expanded sound stage and boosted bass is not an accurate representation of their music; WM1A is more reference orientated, WM1Z is more focused to the Sony house sound, neither one is inferior to the other, equally one is more the prestige option with slightly better internals...