I don't see Polyphony Digital as human beings but as a company that competes with other companies to make the best product, if possible at the best money value. I used to feel emotionally attached to PD and Kaz but those times are gone to be honest, there's that point where flaws and faults aren't acceptable any more, where the negativity and annoyance of negative aspects destroys the fun, and this point is/will be reached for me with GT6.
Back to the theory, if a product lacks in key areas I'm entitled to voice my feedback/critic (and if the product would be fine I could still do that) and complaining about those people who complain is stupid I think. This is a discussion and it should hold a certain value.
The sounds need to be improved. While the graphics and the physics envolve further and further ahead the old faults like AI behaviour, rabbit chase races and sounds stay the same and appearently few to none was done/will be done about it in GT6 from what we've seen so far (I consider the faked real car sounds from the second concept trailer a pretty poor move, it shows how incapable PD is of giving us proper sounds and how they (or probably rather their PR devision) knows about that problem very well).
Obviously their current sound designer does not know how to construct a proper sound design, engine, and sample. This needs to be changed but honestly, how that will be done is up to PD, and we should let them figure it out, they will have to hire a new sound designer, or better yet, hire a whole team of qualified people, with a game of this size it's required.