Number are as numbers are; if protection warriors aren't viable for tanks at end-game raid tiers, then they simply aren't. Just how discipline priests aren't viable during the leveling majority and so on and so forth. If you want to tank with a protection warrior, do so up to the content that you can viably so, that is how it should be in the grand scheme of things. Nobody should be expected to change anything based on one or few's dissatisfaction and while I do, normally, advocate positive change, what this sounds to me is not a cry for change but rather dissatisfaction with an already made decision (to play an underpowered (in that particular content) class) and wanting to get into what is in a way, the best class for said content effort-free. Protection warriors have been growing out of relevancy since the beginning of BC where they gave in to the vastly superior protection paladins.