The chain mechanic works well on consoles in the DOS games, especially when playing co-op. But yeah hopefully they give us more options.
There is literally no design goal achieved by this system, even on the "controller" side of the argument, that couldn't be replaced for the better by simple "everyone follow/stop following" toggle, like Dragon Age did in 2009.
And to be clear I still think Dragon Age Origins had a subpar control scheme compared to other of the titles mentioned across this thread as good examples (Kingmaker, Poe 2, etc). Which makes kind of telling that it's STILL lightyears ahead of the chain/unchain system.