I'm just going to assume until 3.2, that Strength will be made into another Det/SS modifier on tanks and Vit will be 1:1 with AP like the main stat is on other jobs. Until then, nothing lost and not a whole lot gained. I'm hoping we don't end up with another Str x Dex x Vit argument again with something convoluted like 2:1 (Vit:AP) and 4:1 (Str:AP) on tanks.