The treefeller ability is not working. Figured since its not an exploit or profitable bug its safe to post here. It says when used it explodes trees and before mcmmo was removed last time my buddy tried it and said it was interesting the way it did aoe on the tree. Now when you use it, its no different then when you normally click on a tree although I imagine you are doing double durability damage to the axe. I can't be sure if the axe is losing durability like its supposed to with the secondary ability because I run bare bones basic mc with no mods. Tested it several times, try cutting trees normally and with ability and you will see there is no difference in speed or effects. Maybe one of our developers can fix it or Andrew can pass it on the new plugin develops who took over mcmmo.
I know leaf blower does not kick in till level 100 but tree feller doesn't seem to have any effect for myself or my friend chazmeister13 when were trying it out today. I got a lot of tree's to bring down in and around my town so perhaps once the skill level gets higher I will see a change, thanks for checking it out though.