I was a bit discouraged when I heard that the combat was going to be RTwP (real time with pause), myself being a big fan of TB (turn based) and the possibility of tactical combat that it lends to a game. My question is then: how are you going to make the combat in P:E tactically interesting despite it being RTwP?
Answer: Hmm, this is a bit of a loaded question, as it implies that real-time games aren't tactically interesting while all turn-based games are. Believe me, I have played plenty of dull turn-based games with very few options on what to do on each turn, and there are lots of real-time games that are incredibly tactically rich. Look at all of the real-time strategy games out there!
So to answer your question, we are going to make sure that the distinct abilities that our classes will have will each provide different roles to those characters in combat, and that you will always have choices to make in combat about how to best position yourself and use your attacks. In addition, we are going to design the enemy encounters to be ever-increasing challenges, so that one way of fighting won't carry you through every encounter. You will be forced to mix it up a bit, tactically speaking, and use all of your combat skills to make it through to the end of the game.
Let me add that as an Infinity Engine inspired game, our pillars of design include isometric exploration of a fantasy world, a reactive storyline with interesting and believable characters, and real-time with pause combat. Those elements are expected in our game, and we feel strongly about providing them.