by "fixing all the relevant issues in the beta" I assume you mean "they realized that they were pissing off all of the long-time fans"
problem is , within the whole GG attitude. You'll never know what they mean, are they " tweaking" anything in the right direction, etc. They might fix ADS auto aim, yet strong game mechanics behind ads-ing everyone everytime might stay intact.
They know the spawn zone concept( similar idea like in brink- but here they are open automathically, with undestructible bots, where in kz3 is just bare camping- zones working like "capture and hold " areas) is totally flawed, when one team taking all zones opponents are screwed big time- how they gonna fix it? By adding more zones? That Wont change much.
Generally - GG reminds me bunch of economy specialist from one South Park episodes. Kid getting to the secret chamber , where bankers and wall street folks dwell, just to see they all using vodoo - chicken ritual to predict economic changes- where chicken will fall after decapitation,appropriate to this decision will be made- green square on the floor- bail out, red square- selling out, etc.
For me GG doing games based on some voodoo mumbo-jumbo- there is no consistent line of games identity, and argumentation behind is just " naive science".
I am quite hyped for Brink more than for kz3, as first offer at least willingness to fight spawn camping, put the weight behind objectives, and squad cooperation( in all these fields, ironically kz2 was top of the top)