You won't get overleveed down there. It's extremely combat heavy, but light on quests, so with next to no XP for combat in this game there just isn't much XP to be gained.
There's a lot to like about this game, but lots to hate as well. Party AI is non-existent. Scouting mode slows movement down considerably even if there's nothing around, but since so much of the loot is hidden and found only by scouting with a decent mechanics skill, expect to move really slowly or miss a lot of loot.
The UI has issues out the wazoo. There's no appreciable transparency for environments - like trees - so if you happen to get into a hard battle under a tree, good luck seeing what's going on. That also applies to large enemies - huge fliers are a UI screw of the first order. I've had the visual effects of spells mask the aiming circle for subsequent spells. The spell interface itself is far less then useful, with no maximum range circle. Spells that target an enemy with an AoE and spells that target are displayed the same, so it's unclear whether whether your spell will track an enemy or shoot the ground where it was. Some spells - like the 1st level cipher spell that creates a cone behind the target - are completely fubar, with the UI cone extending from the caster, not the target, but having the effect properly extend from the target.
The red/green circles for AoE are themselves pretty ridiculous. Your guys are safe in the red circle, but not in the green circle - which is pretty much the opposite of what I think with a red and a green zone.
What I've seen of the characters, setting and story is pretty cool so far, but the game's interface is fighting me every step of the way. And since the combat is pretty tough to begin with, that's making every tricky battle into a nightmare.