If you use pmds then you don't have to delete any morphs, because they are stored in a separate file and only referenced by the cr2, which means there is virtually no file bloat for unneeded morphs, aside from a single line of code that references said morph. (Unlike injection morphs that have to be in the cr2 in order to work). Their dials can be tucked neatly away in collapsible menus. Creating two versions of a product is actually more work, and can cause confusion where customers aren't sure which version to use, or frustration when they load the wrong one. Plus, clothing often requires adjustment/movement morphs so that it can be posed correctly.

I don't see anything wrong with the idea of having two versions however, if a vendor wants to take the extra steps necessary to include it. There are good and bad points for both approaches. It's just that content needs to be made to encompass the widest range of uses by those buying it, and it seems to me that including all the morphs in a single piece makes the most sense, as that way they can be used or not used as necessary. Plus, the transfer morphs feature does not always work that great, depending on the piece/type of clothing you're working with. Some vendors like to create detailed fitting morphs, so that their clothing looks as good as it can as often as possible. That's not something that transfer morphs will accomplish. Since there isn't a lot of content available for Pauline right now anyway, it shouldn't be too difficult to include all the morphs that currently do exist.

And also, the "Spawn Morph Target" option has always been there in the figure menu in Poser, at least in the Pro versions, and I'm pretty sure it goes back as far as P7. It creates a new single morph from all the morph dials with a value higher than 0.000. Once that's done you can delete any of the other unneeded dials (including the ones the new morph was made from) if you don't like them being in the parameters menu, but that is mostly just for aesthetics, since it isn't actually in the cr2, if you're using pmd files.