I have playtested many games over the years, and adjusting damage is often one of the last elements of testing, and most often it starts off far too high, then swings down far too low, and then recieves many minor adjustments over a short time period(we are unlikely to see these minor changes in a packet until they find a "happy medium").
With capped ability scores and a slower BAB profession, a very minor adjustment to monster defenses or output can become a serious change in challenge. A closed system leaves much less wiggle room than an open one.
I think your expectations are unrealistic. WOTC is not just retooling an existing edition as Paizo did. It is attempting to build a whole new one and combine popular elements of previous editions. Further, you are comparing a completed, established, refined game to a BETA.
The base mechanics are there, the systems are in place, the specific amount of damage being put out is a very simple thing to adjust, even if it happens in spurts and swings, with those already set.