That's interesting. You choose to mindlessly zerg them because the bar for a clear is so low, rather than creating your own engagement. You can get away with "spamming art of war", so you choose to do so rather than actually engaging with your kit even though it's not necessary for the clear.
It's normal content. If you want to be engaged and use your kit, you are free to overkill it. It's never going to be challenging the way you seem to want it to be though, because it has to be easy for the people who only play for the story.
If you want to be engaged, then be engaged. If you need something external to push you to engage, maybe it's a you problem like I keep saying. Just because it's not necessary, doesn't mean you can't do it. The onus is on you in regular difficulty content. There's nothing stopping you from pushing more buttons. It's actually good practice for content where you actually need to rely on the full kit, because you aren't stressed out when executing in regular content.
Always something external to blame huh?