Well, the turn based tactical combat is a extremely good choice since the genre is pretty much dead for the PC market.
Why is it a good choice? Well, look at it from this perspective.
a) Think of it as a new experience. The game will make you to actually think instead of spamming left-mouse button to attack.
b) Tactical turn based combat system is the original RPG method of playing.
c) There's nothing wrong with it, give it a try!
d) The game was originally made to be with this system so arguments against it are irrelevant, to say the least.
e) It's keeping you awake, actually. Action combat based on pressing right-click for movement and left click for attacking can be very tiresome. Like this you'll play like a sir. Literally. Almost like a chess game.
