Jip, good summary so far, although I don´t agree the lacking of see battles is a valid / major point. IMO it was out of the question that PB creates a genre hybrid. The points they were experimenting with (simplifying, pirate setting, new gameplay elements ("Dirty tricks")) didn´t go so well and drained too much dev time from the core game - which bites them back now. If those experiments had worked out and added the missing depth, it would have been quite a good game. The combat system isn´t totally broken, but is missing additional elements and weapon types as well as proper balance. Firearms are too powerful, swords are too weak, item design is non-existant (many swords, but without requirements you end up picking the best weapon per island which ATM forces you to switch your sword 3-4 times (first sword, pirate saber, corsair saber, windbreaker)), crafting is pointless, at least you don´t have to skill it and just "pick it up" by developing your main combat skill.
Just checked Risen combat once more, and it really is a shame & waste they didn´t build upon that one - at least for pc vs creature fights.
Overall they dropped way too much to call that game Risen 2 IMO. Completely new magic system, completely new weapon system, no bows, no heavy melee weapons, no staffs, no shields... Sure, most of it can be "explained" by the technical development (firearms) the game world went through, but from gameplay pov it is missing. Maybe if they put more focus on human vs human combats according to the new setting, they would have gained more from that. Right now you fight 80 % monsters and only a small amount of human opponents. Those fights are fun (at least in melee - with firearms it´s a joke - they should at least be banned from duells with trainers :D) especially if one uses all the additional tactics aka dirty tricks, parade and counter attacks. A pure pirate game without the Risen story would be awesome - think Pirates of the caribbean with battles during ship boardings, tavern fights, more city environments (Khorinis scale!) ... a well.. was already said a dozens of times - wasted potential. Picking up the pirate story after Gothic 2 would have been much better.