Just a little idea for the instance clear voucher:
When someone in your party inside the instance uses an instance clear voucher, show a big message in the middle of the screen [similar to the announcement for maintainence or the start of GvG] that someone used an instance clear voucher.
Many people just use a voucher after a while when they went afk, or they don’t talk about using a voucher beforehand, or they just use the voucher whenever. Since the people in the party who are not on the same screen don’t get any EXP or silver for the mobs killed by the voucher, I believe it would be nice to see a notice onscreen if a voucher was used to prevent people lose their runs/silver/exp etc and get frustrated afterwards [especially when tomes are ticking away and you can’t wait for all eternity just because someone might use a voucher].