In OS1 it was pretty easy to intuitively identify an effective chokepoint at a glance, and to cast an AOE there, or plant your front liners there to guard the back row. In OS2 Im finding that a lot of areas that would have been a chokepoint in OS1 are surrounded by terrain that doesn't look passable but actually is, so enemies are slipping around, running right past my Opportunist front liners directly into my back row.
Less linear battlegrounds are hardly a bad thing.
Besides, no one's stopping you from making a chokepoint yourself. You have the tools, even if enemies sometimes prefer to go straight through elemental hazards. All those molotovs and barrels are great for area denial.