Polearm Mastery sounds amazing. On the other hand my experience from the EA is more in the direction Blackheifer pointed at. My easiests fights ever I had with my half elf GWM Berserker Barbarian in the party. The question perhaps is how easy it will be to protect against elemental damage with potions in the few real fights to come? I never ever used potions except for healing in the combat since EA release, but there seem to be some against all kinds of damage.
I also have to see how playing without the weighted dices will go. I did disable it just some weeks ago. It changes gameplay considerably, so any advice given should mention wether weighted dices are on or off. I have not that much experience (only three campaigns), but what I can say is that it sometimes can be a bit annoying (or funny) to miss in a turn completely with all attacks with all chars

. Not quite surprisingly it seems that having more attacks is better than having few big boom attacks (like Paladins or casters), and having high AC armor is more important. The player can deal with the "fast and easy to hit"-combat with weighted dices much better than the AI, so playing without helps the AI more than the player.