I think a larger black tone lantern would look great. You have only a single light box.. I wouldn't do three. I would personally do one or two decent size lanterns left and right. The size and width of the island would need to be known if you are hanging multiples. Many different lanterns out there in black. I favor the Darlana by Visual Comforts. It's very well made and has more straight lines than the mock up above. The iron on the one above across the top each piece is slightly rounded. This is Darlana however obviously showing in the gold tone. It's available in dark, gold and silver tone. With a lantern the ceilings will need to be fairly high.

Not a pro. You may have to go smaller - 3 pendants could get crowded on an island that’s less than 8 ft long. The trend seems to be to go larger and only use 2, but you can’t go too large with 8 ft ceilings, so it’s a balance. Here’s a guide to spacing

It is not just the pendants that need changing that linear fixture needs to be replaced, you need to add a ton of storage somehow IMO those pendants are too large for the space and as for bulbs LEDs in 4000K to mimic bright sunlight are always the best in a kitchen the pot lights you will have to replace that lnear light should also be the same LEDs Then when you choose colors you will have them be true. You do know replacing doors is almost the same price as getting new cabinets that would go to the ceiling and all drawers for base that is what you need to do to really get your dream kitchen and BTW yes you are going backwards

No this is a small space no need to close it in or add more clutter. Also, you have a nice balanced lit room.