Small nitpick: The Wands of Spellstriking are also useable by Bards.
Small trivia: Mages, Sorcerers and Bards' Breach is an Abjuration spell - while the Wands' Breach is not. It's not treated as a 5th level spell, too. Feel the potential?
As for your
actual post... I have to disagree. Allowing this Wand to be used by other classes will seriously unbalance the game in favor of non-magical soloists - who will have a grand day when they'll put their hands over this baby, knowing that no stoneskinned wizards is going to stand in their way from then on.
__________________
In memory of Ilan Ramon - the first Israeli astronaut.<br />

<br /><br />[url]\"http://members.chello.nl/~j.vanthull/BG2SR/Home.htm\" target=\"_blank\">BGII Spells Reference</a> - everything you ever wanted to know about spells!