Predicting a future problem
During updates Supercell are constantly adding more buildings to the village and what this means is that your 40 destroyed structures that used to get you a 50% can now only account for 46/47% post JUNE 2015 update. This may not sound like much but when going in on a max th10, and many will have seen this in the likes of Galadons video's it can make the difference between a 1 and 2 star attack. To compensate for the extra structures/total base hitpoints, I believe that a slight reduction need be made to the hitpoints of what are typically outside base structures such as mines, collectors. Getting through these quickly will compensate equally once passed the walls.