Unreasonable, unrealistic, or illogical complaints drive nothing.
"I would rather a Dual Core going in all their deviecs so that WebOS can become optimized for it" or "It should be Dual Core because more are moving that direction and thus its better marketability" are reasonable, realistic, understandable complaints.
"OMG! Its not dual core! Its not high end!" is not. Or "This is fail, its last year technology!" are not. If your argument is marketability, having the highest Ghz is marketable as high end. If you're talking comparable to other high ends, other makers such as Sony are using a lower clocked Snapdragon as their high end. If you're talking "old tech", again other high end/top end phones have been announced this year with the same tech at slower speeds.
"I think they should release a slab" or even "Its dumb to not launch another form factor" or possibly "Its dumb for them to try and continue a brand name that has negative mindshare" are all understandable criticisms or complaints that are realistic. "The Pre3 sucks because its not a slab!" isn't.
Suggesting that a phone has to outdo the Atrix...the only phone close to most of the high stats some peple are demanding...a month after its announced in every way or else its "fail" is not a realistic, understandable, or logical complaint.
Pointing out flaws, issues, or problems with a phone does help push innovation. However, you have to be realistic and objective in those complaints and you must also acknowledge reactions to past flaws.
Criticism of the Pre included things like its small screen. They adapted by making a bigger screen. Criticisms of the Pre included things like a cramped keyboard, so they've enlarged it. Complaints about the Pre was the build quality, these units are seemingly getting more positive first responses regarding sliding mechanisms, feel, and aesthetics such as the metal buttons and lack of usb flap. Criticisms of the Pre was the too many cards messages, they've upped the RAM and improved the software.
If they improve upon former criticisms, and you just continue to criticise the same things, it shows you're not looking to view it reasonably or objectively but instead just seeking to complain for the sake of complaining or because you've set expectations that are unrealistic.