You shouldn't have reasons to force groups to pick WAR over the other tanks. We had six years of that.

The tanks are at a point where even relatively minor changes will have a big impact on balance. The easiest way to buff WAR's dps relative to the other tanks is to drop off the fight uptime. That's the reason why WAR/DRK are on the lower end of the dps scale (albeit not by much). Burst favours lower uptime conditions.