Yay, finally finished the game!
Used 95 hours, so it's a huge game.
All in all a brilliant game.
Since I never played the original U6 (only explored half of British' castle), nor Dungeon Siege, it's hard for me to say how faithful the remake is, but I know it was much more playable than the orignal. Most of the annoyances (camera control, pathfinding, frequent crashes) with U6P was due to the Dungeon Siege engine. Using the increased view distance mod may have contributed to the crashings, though.
The things I liked:
Good writing and decent story.
Open ended, with lots of minor quests.
NPCs are quite fleshed out have more personality than in most other CRPGs.
Some very well designed dungeons. Overland was well done as well, but the limitations of the DS engine was more evident.
Nice music.
Very well paced and balanced. At the end of the game that wounded guy in Cove had just recovered and half my party was lvl 8.
So-so:
Combat was better than in U4 and original U6, and it was quick. But it rarely got tactical and I hardly used any combat spells. Just spamming Magic Bows, with Avatar, Dupre and Shamino switching to Magic Swords if enemies got too close.
Things I disliked:
Too many crashes.
Pathfinding could be infurating some times, especially when you have progressed a great deal and notice one or more of the wankers are standing and spinning in a different part of the dungeon.
Boring item system. You never find anything better than Magic Bows, Magic Swords and Magic Armour, except for one Triple Crossbow. No really good weapons for Fighter and Tinkers, since they can't use magic weapons.
Storm Cloak is way overpowered since it negated spell casting, and makes potentially frightening enemies like Daemons totally harmless.
Very small selection of magical Rings and other equipment.
The murder mystery in Skara Brae didn't make much sense. There's no in game evidence, so I just ended up guessing. I thought I had to complete this quest to get the Rune of Spirituality.
Not being able to ask the ghost of Quenten about the Rune.
Having to steal books from the library to complete some quests.
Not being able to ask for directions. Had a hell of a time finding Penumbra in Moonglow, who for some reason was hiding in crypts behind massive magic fields.
No in-game hint (AFAIK) that ships will be available for sale after having free the five main land Shrines. I spent too much time looking for pirate ships or underground routes...
Too high respawn rate. All dungeons and reagents respawn in one day.