Personally, I don't think damage is too low, true I also look for way after way to maximize my own damage output, but at the same time I am building glass cannons
Like today, I let a new person (new to the group and PF) play one of my backup charracters, A barbarian (really liked the concept and is sticking with that sheet). If he had taken the full attack at the end of his charge (pounce via rage power) he could have ripped the troll in 2 and killed it (no fire or acid damage, but he also didn't use the fix for that). His 1 claw did 40 damage and he didn't take his second claw attack or bite (this was also not a crit).
The troll next to the one he attacked, attacked him and dealt ~50 back (3 hits, and rend). Yeah he has almost 300hp, but a fighter in the group had 2 on her and was down to 20ish from ~130 from 2 trolls in 1 round.
Trolls are a CR 8 creature, maybe they were advanced, but we almost lost that fighter and 2 other characters did die (they drowned after being tossed into a nearby river by the trolls)
Maybe it is the dungeon we are in but today made the 4th and 5th death during the crawl (level 6 of a 16 level dungeon). So is damage output low? You wouldn't be able to tell from our group thats for sure