First, to clarify: I will use the terms tactics to refer to "in battle", and strategy as "outside battle".
I don't like the idea of having to get through battle "without a scratch". I like the tactical stakes being a bit higher.
Party Wipe should be an ongoing threat.
The big problem for me with expecting too much strategic planning and encouraging me to min/max in the metagame is that this is essentially encouraging me to embrace my inner munchkin. When that happens,
I break games. I
will find loopholes, and every one of them will be thoroughly exploited, immersion and roleplaying be damned. BG3 doesn't have any GM who can stop me.
The only hope BG3 has is if they limit my munchkin-ness to the tactical level, and allow me to try roleplaying the strategic level without obsessing about the details. Then they
might be able to balance things properly enough that it won't be easy to break the tactics in BG3.