Mesh he only niche I can see Bards carving out for themselves is if NWC decides to give Bard an aggro drop, allowing them to also pull for groups that lack a Monk.
Eh? SKs can split camps as good as a monk: even better in some situations. Necros can as well, as long as they have a little more room to work. Even without FD, a full group is going to have multiple people with lull, root, sap, stun, and snare.
Also, as many others here have pointed out, as long as a bard has a little room, they can CC large pulls single-handedly -- without even calling upon the support of the rest of the group.