I don't see how the ratio of dead Ukrainians to dead Russians is relevant to the utility of winning this war. It can also be construed as an argument for increased funding, because the Ukrainians are losing so badly.

In my view, curtailing Russian expansion is the point of the war, and Ukrainian lives are unfortunately one cost of doing so. It's important that Ukrainians are participating in the war of their own volition; the US is not paying Ukrainians to join the battle, unlike the scenario with the ANA in Afghanistan.

Even if the leak produces good outcomes, it should still be prosecuted as espionage, since there was no good faith motivation for the leak.