I understand that by itself it's not really that good but the amount of times I have lost because for example, my Draven and Vayne were attacking a Kindred and she used invulnerability which only affected herself and they both continue to attack Kindred while Kindred and any other champions they have get free damage on me. This has changed my rounds from winning to a loss and has caused me to lose the final round. One way to nerf her long invulnerability may be to have it act like her ult in SR where it can also turn enemies invulnerable instead of only allies. Seeing it happen is just really frustrating since Iron players wouldn't even attack the invulnerable champ in that situation.
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