I'm sure many people would appreciate having a config option to set the max hardness of blocks that the Trollager can break.
Those who don't like the destruction could set it very low, so it could only break dirt and other weak blocks.

In our modpack, we have increased the hardness of stone and stone brick, to make them more resistant to invading monsters. However, this means that the Trollager is unable to break stone brick, which is unfortunate as it was always intended to be a siege monster.

Something like this:

#trollager_block_hardness
#Determines the maximum hardness of blocks the Trollager can pick up or break with its smash attack.
<
blockhardness=40

That sort of customization would be a great improvement for users who love or hate the Trollagers!