The opportunity cost of shield bash is too darned high

[Steeled]

First, I realize the potential of having a stun on such a short cooldown, and how wonderful it is. However, I feel that the many layered cost of the ability is punitive. Some of these would be fine, but all together, it's too much.

I'm not asking for all/most of these facets to be changed. This is an evaluation of each aspect and how I might change that particular aspect.

TP cost - At 150 tp, a paladin regularly weaving in shield bash can find himself out of TP relatively quickly.

Enmity generation - I feel like the ability should generate more enmity, perhaps as much as RoHalone (not the total of the combo, but the RoH itself at the end of the combo.

Interrupts Chains - Using the ability interrupts our combo. I would change this, or allow it to setup it's own combo with perhaps RoH or Flash for increased enmity.

Global Cooldown - Biggest complaint. Stuns on the global cooldown are not fun. You end up camping the button for dangerous moves and basically just sitting there swinging your wittle sword while you wait. I fully believe Shield Bash should trigger the gcd, but be able to be used at any time during it.