Considering you can go back and play the levels again with a completely different team and more powerful perks (you unlock some new characters as the game progress), while the devs certainly have some solutions in mind (and may hint at those through the confidence “challenges”), there are definitely plenty of different solutions to each level. So while sure, there might be an optimal solution, there’s also a solution where you defenestrate every enemy.
Which is kinda fun, because it’s also fun to go back and replay some earlier missions that had a “survive 5 rounds” with a challenge of “survive 7 rounds” and deciding “I bet I can survive 9 rounds” (though I was a bit disappointed the enemies stopped coming after 9 rounds. But I think there is a bonus side-mission with infinite rounds, so that one might be fun to go try.)
Or a mission that had the confidence perk of “defeat all enemies in 2 rounds” and being able to do it in 1, when the first time took 3.
So while this one is maybe more “puzzle-tactics”, the puzzles are very open-ended.