I also thought about combining the plastic corner and tulip beds, then saw you did exactly that in the progress images, and I agree, it doesn't look as good as I hoped

The bananas should stay, they help! Especially in idea 2, to add some yellow accents.
It really is a tough one, because both ideas have their distinct charm. Whoever likes more possibilities for lore should go for idea 2, as it does look good, just different from idea 1 it focuses more on cyan and aqua tones, and has only slight yellow accents, which still keeps to the Drax theme well.

Add in aqua in a different way, then, not via walls. If you put in enough aqua/cyan furniture into the room, then maybe the floor and walls don't need to be very high saturated? Keep playing with it and you'll work something out!

Edit: Cyan Twilight Sky Wallpaper looks gorgeous. Maybe will have the same issue as aqua walls, but it's worth trying.