The problem with being the "mitigation" tank is that as soon as you out-gear a fight you're completely useless. People will always want to do more damage and clear things faster, but not every job should play the same. It's a fine line to walk to make every job relevant without being too washed out. Paladins are great for defense but they do need enough offense to not be ignored later. I'd prefer their niche be the "main" tank rather than the "mitigation" tank. The proposed shield swipe change would only increase main tank damage, leaving Warriors and Dark Knights to be the better dps/ot jobs.