Burn liquidity instead of storing it inside drill when they upgraded

Evolution land game is designed as kind of liquidity mining game, the only source of generating liquidity is by farming and upgrading drills but when we upgrade drills, it stores liuidity inside and that doesnt participate in overall LP pool. I would like to propose that each time a player upgrate his drills, Liquidity will be burnt forever. another thing I would like to suggest is, right now drills can ot be upgraded for multiple resources, but we should allow drills to be upgraded to multiple resources as if a player is mining different resources in same land, such multi resources drills can mine multiple resources simultaneously. This will increase the utilization of resources and increase overall liquidity. For example, drills required around 450 Fire LP tokens to upgrade next level and another 500 to upgrade to current maximum level. We can put condtion that the drills with max level for all resources will be able to upgrade to third level. As apostles mining power is average 2-3 resources/day, players will need higher mining power drills to achieve full mining range of their land and so they will be spending resources to upgrade drills. again for iron drills and steel drills whoes mining efficiency is quite less for all three levels, this new third and fourth level wil be ground breaking. Current scenario mined resouces are either sold and holded but not utilized. I hold significant amount of Land and Drills and Apostles, all my drills reached max mining level possible and I found no use of resources mined. It's like I am visiting the website once in two months and so and dont even bother to harvest as there is no use of resources. I propose this so we can have some utilities of mined resources