Since the release of 16.0, my efficiency picks are not the same.

Efficiency 5 was added, so efficiency effects were retuned,, but the new efficiency 5 pick is not as efficient as the old efficiency 4. Using the efficiency 4 pick I was able to pop two stone per trigger flutter on my controller. This made tunnel mining very rapid and luxuriously efficient. (I was able to mine to bedrock, then zip down lanes at walking speed in search of beautiful, beautiful diamonds). Now, since the update to 16.0 and later, efficiency 5 is only able to pop one block, reducing my mining speed to below a standard walk. (I was aspiring to use run and mine, but wasn't able to watch quickly enough yet to try it,,, I think the game should allow run mining which would warrant the faster picking, and provide new obstacles to overcome as players plunk more frequently into magma). The old efficiency 4 pick was able to mine a two block tunnel faster than the character actually walked, so walk mining was very safe and lucrative.