I think the pots Carvin uses are 'fresh', and hence need working in. Mine have. However, while they require a heavy pull early on, the motion is smooooooth, like hydralic. And they don't 'knock' at either end, even if you clack 'em.
The HH2 is a nice guitar, uber light, but it's a weird beast. (I went stock to see how Holdsworth wanted it.) On the tuner, striking a note reveals a slightly delayed rise to pitch - and then it stays there, immobile, for eternity. VERY pure tone, with a lot of mid. The stock set-up is very firm, and the jumbo frets reinforce this, which results in traditional bending being a little weird. No surprise, as Holdsworth doesn't do bends. The response, though is crazy, legato is super easy, again made for his playing. The stock pick-ups are both mid-rich. The bridge pick-up is low gain-ish, but has enough to do metal without a lot of amp gain. Still, not really made for that. Smaller frets, and lighter string gauge (I think they're 12s) might help.
In short, I love it, but I always go back to my DC or other strat design for chunking.