I was thinking that battle board skins traditionally have been implemented in 2 ways;
- only you see it
- the skin is split half/half for you and you opponent
I think we can do better than option 1 and 2.
For example:
If battle boards got assigned points according to rarity (for example) you could implement that the battle board with the highest highest points, will be shown to both players. That way battle boards will become more attractive and an even bigger flex (hopefully = more money in skin sale)