Tower Shield usable by Xbow hero only?

[Looter]

Seems great, reduce the number of viable shield bringers and forcing them to either sell or respec if they want to continuing contributing to the team by bringing one in. You don't really need to feel special, you already have 9 shielding, the second best in the game and people will pick up your dropped shields regardless of who brings. I also don't beleive that the tower shield is all that common in the first place though, so it wont help anyone to reduce how many shields are brought to the game.