I second all of this.
Would i rather have a v3 battery? Sure. Would I trade my 2015 V1 p90d and about $10,000 (the price gap these days between V1 and V3 cars) in order to get it? No chance.
Except it seems when you are looking to buy a P90D, the prices are all lumped together for all the P90Ds. By that what I mean is that people selling them are not charging a premium for a V3 battery pack. In fact from my experience, most people selling a P90Ds don't even know what version battery pack they have or how to check the sticker and I learned all that by reading the forum.