Exactly, and yet they are there.
Flanking strike is a gap closer and dps, it also provides a damage boost for two other abilities with tip of the spear.
Butchery is an AoE that gives you a heavy dot in an 8 yard range. The ability to have a gap closer followed by an AoE heavy bleed is amazing for both pve and pvp. If they gave Butchery a gap closer i would be in heaven.
You don’t need to use butchery and Flanking strikes together, just like you don’t need to use any other ability that you choose to take in the talent trees. What they are taking is the ability to choose to have both, with no compensation for one, and compensation for the other (potentially tunneling you into it). Player choice comes in a fork in the road or freedom of opportunity, fork in the road gives you two paths, thats it, freedom of opportunity gives you both paths IF you want to choose them.
There are other options in our kit they can do to address button bloat but are choosing to strip away the ability of people to choose both options. Gap closer with damage, or heavy aoe Bleed.