The Cloak of Displacement makes your character transparent. I'm probably going to use it for the rest of the game, but I don't want my onscreen guy to be transparent for the entire game. This reminds me of the Barkskin spell effect from BG1. A certain artifact gave you constant Barkskin, which made your character dirt brown from head to foot whenever you wore it. They changed it for BG2 so that only the spell changed your character graphic.
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The screen focus jumps to your selected character at the start of his turn, and this is fine. But I personally don't like how this also occurs in other circumstances, like if you cancel an action such as casting a spell. After the turn has started, I don't need to be re-focusing on the active party member again. Usually, I'm searching out a target and considering my different spellcasting options and the screen keeps jumping away from what I'm doing.
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What about being able to see your target's HP when you cursor over them while casting a spell?