I see some people name them one of the good Larian’s homebrews which I kind of cannot agree with given the current state of this mechanic. Two handed weapon AOE attack are very much overpowered. Pin shot while not as overpowered still better suits to somebody who has mastered the respective skill rather than to anybody happened to posses a ranged weapon. Topple performed by mage is kind of ridiculous.
I see them as yet another attempt to inject more entertainment into the D&D combat workflow. As a skills they are kind of ok, but they shouldn’t be available just for anybody. Make them be obtainable through a leveling up or any other corresponding process which requires investments.