> If your combat system is so complex that people find (or even feel that they need to find) “exploits” in it then your system probably sucks.

Couple of things.

1. People will try to find exploits in just about any system. That's kind of part of the fun.

2. If the difficulty curve sucks in a particular D&D campaign - that's the DM's fault, not the system's. Plenty of tools at DM's disposal to make campaigns less combat focused or being more lenient to players.