Can't really say much on Arcanum but it it was badly balanced and the RT combat was a joke.
TOEE they got the D&D combat system almost spot on , but the rest of the game was neglected because of it.
With Bloodlines, the presentation was good, but the combat was weak and the game just ran out of steam (bad pun) towards the end.
Now if they could have gotten the balance right , even at 75% on each catagory (assuming that we ignore the bugs) then the games would have been much less flawed.