The thing to understand is that DAZ cannot do a ‘version of Mike 5 and Vicki 5’ for Poser. Mike 4 and Vicki 4 were built on Poser technology, Mike 5 and Vicki 5 are not. M5 and V5 use a lightweight mesh (less than a third of the polys as M4/V4) that nevertheless bends better and renders smoother than M4/V4 in DS4 because of the specific joint systen and subdivision systen used in DS4, and the mesh being constructed specifically for that joint and subdivision system. And the addition of new morph sets and UV sets is transparent to the user without any need for injection and/or product reinitialization because it’s built on a completely different systen to Poser.
DAZ cannot just produce a version for Poser because Poser does not support the technologies that are used in m5/V5. it does not use the same joint system, or support the subdivision system. it does not support reading the formats of the files that the figure is in, or the on the fly morph and UV set integration system.
If DAZ were to produce new figures for Poser, they would be exactly that - new figures for Poser. They would not be versions of M5/V5; they would be an entirely new product line of Poser figures, constructed to get better results than with M4/V4 by designing them for the systems and file formats used by Poser. Just to start with, the base mesh would have to be quite different, at least around the joints, customized for the Poser joint system and smoothing; following that would have to be a new rig; and then some new system for morph set distribution; and so on and on. So if you wish to ask DAZ for that, then go ahead and ask, but be clear on what you are asking for - a NEW figure set for Poser, not ‘versions of Mike 5 and Vicki 5’ that aren’t going to happen and can’t happen unless SM decide to develop and integrate implementation of the DS4 joint system, sub-division system and file format (and a few other things) in Poser.
So if DAZ were to start a product line of new figures for Poser, it would be a new, parallel line to M5/V5. Given that they haven’t even started on any such thing, even if you ask and they decide to grant your request tomorrow, it would be starting this new line from scratch, and products wouldn’t see the light of day for a long time. But frankly I see no sign that DAZ have any desire to develop and support any such parallel new Poser line, only continue support for V4/M4 as long as PAs wish to keep on making generation 4 products. while pressing ahead with the generation 5 - Genesis - line built on DS4, not Poser technologies.