The solution for this is simple: don't make Live Action.
Everyone here will have a time of adaptation to the material at first and it's normal, any adaptations from a visual support if not from book or 100% accurate like the next mario movie is bound to subvert people's expectations at first because of the visuals.
The real questions are :
- Is the art direction coherent ? (are the costumes, the sets, the makeups, the visuals blending in well together ?)
- Is the core of the story respected ? (Theme, bits, huge plotpoints, characterization, setups-payoffs etc. ?)
- Is the material able to reappropriate the source material in a creative way ? (Did it extend on things we could need?)
- Are the actors playing good enough to make us feels the magic of the characters ?
- Did the crew manage to get around possible limitations in a creative way ?
The rest is just bonus.
This poster gives us two answers:
1. There is a whim to stay close as much as possible to the source material (the design of the costumes)
2. There will be creative choices involved. (The shoes of Luffy/The designof the Ship)
We don't have anything more, so let's wait. And don't worry, if thing are well done, you may have a bad feeling at the beginning of the serie, but will disappear soon enough.