just to say, there's a big difference between quality and complexity.  just as a for instance, that 50 texture thing would actually turn me off. why do you need to bloat my runtime?  is you model so complex to texture, 10 designs wouldn't do?  and 50 designs communicates mediocre to low quality compared to just 10.   personally, i consider simplicity a sign of good quality.  tired of products stuffed with lots of things i'd never use. 

so if you're asking whether you need to make your products total swiss army knives that do everything while not going below that level of quality, i personally feel and have observed that it's not tons of options that mark popularity or people's perception of quality.  it's how good your stuff looks and does it work easily.  just as an example, the Glamorous Collection was hugely popular when it first came out.  from everything i've heard, it works very, very well as dynamic cloth.  thing is, the dresses aren't UV mapped, don't have an edge, and the 30 different materials are five different types of material in 6 different colors.  it didn't, for instance, come with tons of different props, have UV maps and lots of different complex textures, there's no mention of morphs for fitting (larger sims well, but smaller really needs fitting just like real clothes) or versatile usage (it really matters how you start when you run a  cloth sim).  certainly no mention of different cloth room settings to go with each material type.

his newer products are more complex.  but the Glamorous Collection is the only one i remember seeing in multiple newsletters and stuff.