Pendant light choice would usually be for a specific purpose so if you will move things around I would have a rethink. It may be possible to have a pendant with a long lead & hooks for the cord that would allow you to move it within a reasonable distance of the connection point. Maybe some general lighting might work better e.g. or two or three directional spotlights along edges or the ridge line & on dimmers if possible. Subtle strip lighting at the top of the grey wall & the addition of a feature decorative wall hanging & potted plants would look nice too.

I share you concerns with the look of the light. I lived in Cairns for a while and many restaurants etc had high ceilings with lights and fans with a more traditional look. Maybe you could do some internet stalking of hotel websites etc. I'd start with Palm Cove. Good luck.

If you are using LEDs always choose warm white for domestic interiors.

I suggest printing off your plan and drawing your furniture on to scale. Allowing for at least a metre between things like the island and table, sofa etc , it will be hard to fit everything in. The room has a lot of doorways etc that need access space. You could perhaps have the dining table in front of the island and then a couch facing the island but is this enough seating? The other thing to consider is what dining seats you have and how much space they take up, both in and out from the table.