gas - when the dust settles and we have accounted for the differences in effective series resistance of the new caps, coils and so forth, the frequency balance and phase response should be nearly identical to the original design. The improvements will be in the areas of ease, definition, clarity, perceived dynamic range from quieting background noise and so forth. We may lift a veil and sweeten things a little. But the tonal balance, and so forth will not substantially change.
It bears saying that we may well be improving the Thiel strong suits.
We cannot reduce the amplifier demands because the low impedance load is necessitated by the various correction circuits to cover the wide bandwidth of each driver. But, we may (if the customer wants) add a bi-amp option. When done right with the same amp for highs and lows (4 identical channels), each amplifier has a much easier time driving its load, plus any distress is sequestered to its own range. Audible improvements are certain. But additional amplification and cable requirements add expense.
Nothing comes without cost. Our intent is to jump performance league with a modest enough cost burden to justify the expenditure.
FYI: Bryston was a long-term collaborator with Thiel. The cubed (3) series is said to be strong with Thiel. The CES introduction of the 3.7 was with Bryston to high acclaim. I don't know their line, but your reported disappointment may be because of too little power / current.