There is currently a debate going on about whether to encourage helicopters to use CDFA procedures; as someone has already said, in EU-OPS the penalty for not flying a CDFA approach is an increased RVR (and this can be waived by the Authority). A similar penalty is likely to apply to EASA OPS.
It is not clear (to me at least) where WIGY' has obtained the information that the DA(H) will always be higher than the MDA(H) - certainly the DA(H) calculation in EU-OPS Appendix 1 (New) to OPS 1.430 appears to be the same for a CAT 1 (system minima 200ft) approach and CDFA with the exception of the 'system minima in Table 3' (which ranges from 250ft - for a localiser with or without DME, to 350ft for a vanilla NDB; with an RNAV/LNAV at 300ft).
As the level segment of an MDA(H) approach can be flown in IMC it is likely that the minimum speed will be governed by the Flight Manual (Vmini). Some gains here though as approach speeds are between 70kts and 90kts - lower than for our heavy fixed wing brethren.
There has been representation to EASA not to mandate CDFA (with its addition to RVR) for helicopter and they are unlikely to press the issue. (As was previously stated, this could have had an effect on the ARA (DH below system minima) and complicate Point in Space procedures.)
There is likely to be encouragement from the Authority (EASA) to move to CDFA for airfield procedures as there is no doubt that it does improve safety (as has been seen in the ALARP work).
Moving to AERAD only postpones the inevitable.
Jim