I wonder how many of these posts are trolls? I haven't had any issues whatsoever with 4.3.1. I also didn't have any problems with 4.3; battery life has been absolutely stellar and call performance actually improved in 4.3.1.
The timing of all these "bitching" posts just seems suspicious.
Or maybe you aren't using one of the affected phone models, or maybe it only affects people in areas with a weak signal, or perhaps you simply haven't noticed the drop because your battery life is still "good enough". For myself, the drop in battery life is quite apparent because I went from having my unjailbroken 3GS make it through the day easily to me needing a charger to make it through the last hour of work (yes, Ping is turned off).
How is the timing of these "bitching" posts suspicious? Wouldn't it be natural to note a problem after the patch is released and you install it on your phone? Wouldn't it be equally natural to hope that the next patch fixes it?
Just because you are apparently unaffected doesn't mean the problem isn't real. 4.3 destroyed my battery life, 4.3.1 didn't fix it, here's hoping 4.3.2 does.