Well Wood and Glue is nothing like Hardox and Welds. Plus the weight of wood will heavily limit the potential thickness. Wood is also an ablative armour, so although it'll hold up for a while, it will all along be losing bits.

Plus if we encourage destruction (so people make intentionally weak robots) and the use of certain weapons that would normally be useless against metal armours but great against wood then we have destruction.

It'll be interesting to see how the pool evolves.