Incantus wrote:How would you arrange the cards in that window?
Well, I would make that window up of "spots". A spot is a rectangle with different background that contains cards exiled by one specific source. The name of source is on the bottom of the spot, and zooming at it will show you the details about it.
Similarly, zooming on a permanent on the battlefield that has an associated spot in exile brings up, in addition to other things, the list of cards in its spot.
In addition to spots (which can contain face-up cards, face-down cards, or even piles, i.e.
Mangara's Tome), there is an "oblivion" pile in the exile window, which are cards that are exiled, but not tracked by anything. This includes either cards that are exiled without any tracking effect (for example, by
Cranial Extraction), or cards where all relevant tracking effects have ended (for example card imprinted to
Chrome Mox after the Mox leaves the battlefield).
Haunt is a special case. A creature that is haunted should be marked in some way (perhaps by an attached pseudocard), and the name(s) of haunting card(s) will be shown when zooming. All haunting cards share the same spot. When a haunted creature dies, everything that haunted it is moved to oblivion pile, as it won't have further effect on the game.
All suspended cards, similarly, share the same spot.
The exile window could be either separate, or joined at a side of the main table. However, the suspended cards should be ALWAYS shown at a side, even if the exile window itself is separate or not currently shown. They are important and need to be taken track of.
BTW, your question about color: Base color is determined solely by the mana cost, but the characteristic-setting abilities that change it apply everywhere - for example, you can fetch
Transguild Courier from a binder with
Glittering Wish.
Even if a permanent loses all abilities, this won't change the color set by such ability, since color changes are processed before abilities.