(This comment is my opinions)
Like I said above, the map doesn't seem very special as the theme is very common and predictable.
The bottom of the islands don't look that bad, the middle island looks a bit awkward underneath though. The ores under the island don't blend in much with the stone palette under the islands, maybe add in just normal stone as well? That'll help it blend.
I like the leaves that are hanging from the islands, gives it a nice 'Ruins' feeling. The trees could be a bit bigger though, they look quite small and unimportant in a way.
EPICMATT88 is right though about the acacia wood, it doesn't exactly go with the overall island palette. Maybe spruce or dark oak would be a better choice.
I think that the leaves on the outer island are quite out of place. I also don't understand why there are stone slabs on top of them as well. Maybe make the leaves a bit longer when hanging off of the island and scrap the 'bush' on the outer islands and change it to something else like a ruined stone column or something.
There are lots of improvements I've listed there (sorry if you don't understand some of them). But if this Map is denied, then I believe that those improvements would help a lot when you make a revamp of this Map (if you do make a revamp).
Once again,
EPICMATT88 is right about this being a good map, it just needs some changes and improvements.
Good luck with the acceptance.
~ SamThePugMC