I think we might be over-valuing small rez based on our experiences with Huge Rez. The new Rez is much, much riskier due to its shorter range and I think that will come into play. If you are very badly out of position when you die, Mercy won't be able to resurrect you without dying. We've been playing with Mercy 2.0 for about 24 hours in the live servers, so I think there will still be an adjustment period for a while yet.