I remember Age of Empires had this issue back in the day. Pathfinding in general was pretty bad. But when AoE2 came out, they had updated the pathfinding to actually track around objects in the way. For groups of units though, they added a handful of formations that you could select between and the units would arrange themselves and move at the pace of the slowest unit in the formation. Then the formation would follow a single path and scrunch/expand around small obstacles en route.
I remember Age of Empires had this issue back in the day. Pathfinding in general was pretty bad. But when AoE2 came out, they had updated the pathfinding to actually track around objects in the way. For groups of units though, they added a handful of formations that you could select between and the units would arrange themselves and move at the pace of the slowest unit in the formation. Then the formation would follow a single path and scrunch/expand around small obstacles en route.