I've got both knives, the ZDP and S110V. The ZDP knife isn't any different from the usage standpoint. It's plenty strong enough to do the things I do with folders, and slices very well. To be honest, this is the first time I've heard this as a complaint. I have heard the opposite, that the S110V could have been made thinner and still been strong enough.
As far as the complaints of it being too thin, was there some kind of failure related problem I didn't hear about?
No matter what you do design wise someone will find something to complain about. The majority of the time it has nothing to do with function, just somebodies preference.
I typically like thin slicing folding knives, not pocket folding pry bars that don't do either job very well IMO. Typically too thick a knife is frowned on, though I didn't see the S110V blade as being too thick to make it less of a slicing type knife.
I also don't see my ZDP composite shallot as being too thin, or unable to do anything I need it to do.