The Sony Zeiss lenses are Sony lenses. Zeiss involvement is highly limited. You can't even repair or do maintenance on one of those lenses at a Zeiss facility.
One the one hand, there have been some serious bumbles in the Sony Zeiss line. The new 24-70mm F4 is one, IMO. Performance is only marginally better than the (surprisingly) not too bad 28-70.
On the other, some of the best optics I have used is Sony/Minolta. The 135mm STF is currently branded as a Sony lens, and is one of the highest performing 135mm primes for SLR systems. The lens out-resolves the A7r sensor at even the extreme corners, wide open. The Minolta 85mm limited is a better lens than the Zeiss Alpha 85mm F1.4, and the Minolta 600mm F4 is a better super-tele, image quality-wise, than even the new Canon 500mm F4.
Just to name a few examples. Minolta is Sony now, so I'd expect no less from modern optics of the company.