ZE and ZF lenses are heavy duty DSLR lenses, I respectfully suggest they work best on the C/N platforms. The 35/2 Distagon for example, is heavier than the a7r body.
These are indeed now fading into the rich and illustrious history of Zeiss, being as several are warmed over versions of Contax Yashica predecessors - 85/1.4P, 50/1.4P, 21/2.8D. The real standouts are the recent releases: the 15/2.8 D, 135/2 S, 25/2 D.
Which is why lens aficionados are so interested in the FE lenses - these are aimed squarely at Leica users, still smarting at the big sensor 'smearing' their M lenses, actually designs with huge beam angles causing problems never before seen, due to the expertise Leica developed in profiling them into orderliness.
Sony correctly attended first to the low-mid needs for lenses, these new ones are expected to be Zeiss rising to the challenge - their natural target body is the a7r, obviously.
Some think they will be warmed over ZM lenses with a more sensor friendly exit pupil placement. I don't agree, and feel we will see something special, a continuation of the recent output: the three mentioned above, the fine Touits (the 50mm macro is excellent), and the Otus. So more of a scaled down in size, high end set of five lenses.
The best part is Zeiss have very close-coupled technical relations with Sony's sensor team, which is much better than the distant target of C/N in the last FF series - they know just what is required in the LOXIAs and are already doing pre-release PR = confidence! They might cost...