Since the plant was already flowering in a small pot, it was pretty old and stunted. If it was a determinate tomato it may not do a whole lot more. Even if it is an indeterminate it will probably not reach its full potential.
Unless you can keep potting up to keep any plant actively growing it will stunt. I have actually done this deliberately to papaya to keep them short and pretty much it is what you do when you are training a bonsai, you are pruning the tops and roots to control their size.
It is best when growing or buying vegetable starts that they are young and in appropriately sized pots for their age. They do not do not do well when their growth is checked.
Tomatoes are technically perennial in warm climates at any rate. If it is an indeterminate tomato, you buried it deep, in the ground or an appropriately sized pot (I use 18 gallon containers), and you have fertilized and watered enough more roots will form and the tomato may eventually start to look better and produce more fruit.
I know a few people who buy tomato starts in 4 inch pots and when I ask them how they are doing a couple of months later, they say not that good and the tomato is still in the same 4 inch pot.
Happy gardening in Hawaii. Gardens are where people grow.