The Touit lenses designed for the Fujifilm X series haven’t been very successful so far and I feel that there are various reasons for this.
Firstly, the first two lenses released (12mm and 32mm) are probably too close in terms of focal length and performance to the Fuji 14mm f/2.8 and 35mm f/1.4. Granted, the 2mm variance between the two wide angle lenses makes a bigger difference than the 3mm variance between the two standard lenses.
Secondly, there is the fact that while the name Zeiss is synonymous with high image quality, Fujifilm has also managed to construct a very good reputation with its own line of lenses.
Finally, Touit lenses have been designed for two systems (Fuji X and Sony APS-C). When this happens, products often end up being more successful on one system than the other, regardless of actual performance. I personally find a lens like the 12mm f/2.8 more attractive on the Sony APS-C system, for the simple reason that it doesn’t have any native wide angle primes.