I'm probably a bit out of date in spite of having played fairly recently as I still haven't un-learnt some of the "truisms" from Ego Draconis which became less of a big deal in DKS, e.g. the extreme rarity of the very useful malachite gems, which become not plentiful but less rare by the end; by which time I still had most of those I'd acquired early in the game! So don't just sell them for easy money but don't hoard them either...
I assume it's still the case that dual-wielding is better than a two-hander as you get more enchantments that way.
You can jump slightly higher if you backflip, which can be useful if you fancy doing some rock-climbing.
I dunno, you'd think I'd remember all sorts of stuff as it's only been a couple of months. Hopefully Raze will notice as he's a walking encyclopaedia.