I haven't looked into fan theories or anything but its pretty much accepted at this point that Arnold is still very much alive and is either trapped, or most likely, hidden himself in Westworld right? Otherwise, Ford would have really no motive to be making these servant-esque undocumented hosts. No doubt, he's been doing it for years but perhaps now he is finally to a point where he believes he can find/locate/best Arnold by setting hosts 'free' in the park? Doesn't seem like board has any power over the situation, case in point Arnold smash, so there must be something driving him since his comments sort of confirm this isn't all for legacy's sake.
Or maybe his plan is to place his hosts in other real world position of power, maybe to extend his god complex even further? Who's to say he doesn't have more hosts working for Westworld? This episode opened the show up a lot for me, very excited to see where it goes.
Side note: Can't wait for The Leftovers Season 3. Love these slow burn, culmination type shows. Wish they would announce a Knick Season 3 but it doesn't sound like the show had enough popularity to keep going.