In the previous test, I had no problem kiting in PVE as a mage, although some of the changes for this test will change how that works.
The DEX -> Speed increase for this test will also change how the PVP and PVE mechanics work, so we will just have to try them out and see how they impact our playstyles.
The combat was reasonable in the last playtest for the current state of the game - alpha. As for stutter stepping staggering (are you talking about interrupts?), I didn't notice that as a mechanic and it didn't affect how I kited. The only good interrupts I used were killing the mob or using Power Word: Stun, at opportune moments. There are a lot more stun type skills and also slows, both should help if you want to kite more effectively.
I didn't encounter any skill ceiling at all.
Overall, combat was probably too easy for PVE which is why we have seen a number of changes in the upcoming playtest to balance it out for both PVE and PVP.