The current high health, long repairs, and "I-Win" shield aren't really fun or engaging. There's only so much one can really do with a face-tank tank. But what if it had less health and repaired itself? I was playing Warframe as Nidus. For the unaffiliated or unaware, Nidus is a tank. Specifically, he's a regen tank. Unlike almost all other frames/"characters" he has no shields, no automatic damage-negating abilities, and only one healing ability which can't be cast normally which only heals over time when standing within the area of effect. So how does he survive when every hit deals health damage and he has to stay on the move? He regenerates passively. Instantly upon taking damage and while taking further damage his health, he is always regenerating, effectively increasing his total health pool dramatically against sustained fire. Now apply this to the Vanguard: 1000 less health to be put on par with the other tanks, no vanguard shield, and passive, permanent auto-repairs taking the ability slot. No more emergency "I got flanked" button to save the driver, but no more lengthy repairs and much more up time without feeling unfair or sacrificing tankiness. This could be implemented as a super NAR or as a 4000HP overshield, though each has their own advantages and disadvantages to them. Personally I think a regular 5000HP tank makes more sense and feels more balanced. Disclaimer: This is meant to be an improvement/buff to the under-performing Vanguard.