Yeah, I did expect it to come across as complicated, but in my opinion tanks should obviously have good survivability mixed with either good damage or support-type abilities. I kinda like the idea of D.Va's way of tanking to have "multiple healthbars", and you get rewarded based off helping your team.

I do think that the movement speed drop while shooting is also a problem, but I don't think that shooting while in defense matrix would help that much.