Maybe there will be some good to come from the leaks. It might force Europe and allies to double down on support if they think the leaks give Russia an advantage.
It's also interesting that one of the leaked documents said that only 2 European countries have not assisted Ukraine (Austria and Malta), so even countries that have been optically trying to look neutral, are in fact not. This is especially noteworthy with Serbia who has tried hard to maintain it's relationship with Russia through all this and hasn't participated in sanctions. If the leak is accurate, they were planning to, or already have sent lethal aid to Ukraine. This could put them in a position where they need to cozy up to the West more, which in turn changes the political landscape of regions fairly significantly.
https://www.theguardian.com/world/20...to-arm-ukraine