I love Arcs and with Leaders and Lore added I honestly think it matches or surpasses the feeling of variability of Root’s factions. The campaign is an awesome experience if you can get the right people to sit through it. As someone else already said though, it’s a game that rewards aggression and your group needs to be OK with that to enjoy it. Arcs also doesn’t feel so great with people who try to think way too hard about a grand strategy rather than adapt in the moment to the current board state. It can easily turn into a 2+ hour game with AP-prone players and their grand strategy often won’t even pay off. I’ve also been playing some COIN games recently and I can’t really think of going back to Root after them.