I guess a lot of these issues are created by having a large amount of vendors who have control on where the files automatically unzip to. Newer users tend to just install/unzip and find the new product in program. I guess some are a little nervous about moving things about in there runtime when there not sure what everything is.

Standards of where objects are located change from time to time mainly with Daz Studio. So there will always be numerous possible locations for a number of items. Unfortunately going forward there is no real option for remedying the issue in folder structure setup(Besides Manual sorting) as there are numerous established standards.

Sorting the items within your runtime after installation is a good option for overcoming this issue. For an experienced user its quite simple and an extremely effective method in indexing your content. The only hitch is the manual file dispersement required when installing all new content and the learning curve on understanding the numerous content types for new users. 

I believe metadata provides a good solution for the issue, creating a more intiutive UI for content searching and location. Metadata provides a solution that requires minimal manual file placement and when configured correctly can work with all existing or new content that is created. And is easily added by any user once its setup for any product. And should be included with new Daz Products where possible imho. In reality if you don't like the metadata system you don't need to use it. 

Metadata works by creating relationships between objects which can lead you to the material preset your after for that prop easily and effectively. With a reduced click count. And eases the brain strain for those with less then perfect memories like myself. :) With the metadata method it doesn't matter where the active files are located. Allowing for the vendor to setup his runtime structure in the way his/her buyers prefer but without having to stick to a single setup standard. 

As I have said before its really up to you which method you prefer to use but I've found metadata to be nothing but useful and something Daz supported product vendors shouldn't overlook. And really what is the harm in allowing a Metadata database to be established for those that want to utilize it?