In one way, yes it gives a broader aspect on the way different cultures perceive cars, how they drive them, what do they like, what to they envision for the future etc.
Another aspect is how the gaming industry is different in other regions of the World. Some gaming communities may find something brilliant, whereas another community may find something tedious. Positive aspects of establishing a world wide feedback is that you can gather qualitative data back and hybridize what the customer wants on a whole.
But there are a few issues involved, One. You may lose some of the uniqueness of the product because it will evidently lose some of its character. Another aspect is cost. More staff, more PR, more skilled employees, more acclimatization to different ways of handling business. It could be messy. Also you run the risk of disenfranchising the core supporters of your product if the result does not feel like it has heritage in its previous editions. By the most part Polyphony digital runs on a skeleton staff compared to other gaming companies! Would Sony who are in trouble themselves authorize a risky cash injected market strategy to a company that seems to run fine as it is?
I'm sure its not the case but I have often wondered does Polyphony run like Lucas films. Does Kaz take creative control and others around him are afraid to question the decisions the man makes? timeliness set, the content, the input of data etc? Whether GT6 is on the PS3 or not Sony are going to be keeping a closer eye on proceedings at the moment. The last thing Sony needs for their rep right now is another unfinished product!