There's a picture of a pure fighter sitting on a little over 12k HP with capstone boosting. Before the boost I still had around 8k HP, and would have more if I had a complete LGS set on that character. I'm all for small power creep bonuses, but the reaper trees give +10 HP per enhancement spent (+12 for tank, but going to call it +10 so that the numbers are easier so this will actually be a lowball) as well as +130 from tank cores giving around 1700 extra base HP, which will double many non-tank builds HP when all reaper bonuses are accounted for. Now personally I can live with this if it does make it onto live, but it seems like it defeats the purpose of a difficulty where enemies go from taking two hits to kill you to one hit, when enhancements then move it back to two hits.
Edit: No idea why the picture isn't working on my screen, my tags are correct and whatever. I also have a direct link: http://imgur.com/d984BZN : So that's the picture if you can't see it on forum. Note the build in the picture is a maxed out con build mostly just showing the absolute silliness of the HP bonuses, but my warlock build with 2,500 HP on live in shiradi was sitting on around 5k in reaper. Also bear in mind that it was only thanks to a current lamma glitch that I have as many reaper bonuses as it'll let me take, and presumably getting this much HP would normally require a lot of grinding (So while players will eventually be running around with 1700 HP, it'll be a gradual process)