The big thing for me was the sound design. The copters are pretty crazy sounding in my little 5.1 system, and the whole gladiator fight scene had some bits that sent my dog running. There's a pretty rich world in Dune and I think a high budget mini series may have been a better way to explore it. Then again, I thought the same thing with regards to LOTR/Silmarillion and then they made the Rings of Power.
Keep in mind, the word 'decent' in the context of a 2024 action movie isn't exactly high praise. What's the last action flick you saw with everything you mentioned that was merely 'decent' ? Probably not very many of them in the last 10 years.