They're not going to change the models even though it's the best solution, imagine how much work that would have to be.. changing the quips/cards/finishers etc.. this latest patch did very little to address the defensive legends.
Risk they run with adding more hp is creating a horrible tank meta. The game is meant to be the abilities/ult is flavor and the aiming/gunplay and so forth is the the proper gameplay where the person with the better aim wins.
I'm playing Caustic right now and I get hit before I even come out of cover so many times the model is that big, it's * stupid. Whoever came up with it doesn't know what they're doing.
I just hope they don't make future legends big like Rampart I think it's called guy who is meant to have a riot shield? it doesn't work. I guarantee the 2 defensive legends are the least picked of all.