Revamping and adding a few new game elements are completely different things. One requires huge changes, the other doesn't.
What kind of game element are we talking here?
The small changes I'm referring to and have done so far are something like changing the feel and shape of my UI, adding new character/item/ship/sprite designs, changing the shape of the textbox/text bubble, changing the exploration menu from text based (choosing from a dropdown menu) to map based (sprites on a map that can be tapped/clicked).
I don't know how it is with other people, but even changing small details like that can fuel my urge to revamp the game, the last one that occured was when I changed the atmosphere of my background hue from bluish to greenish, the game originally have a slow and more strategic pace and gameplay, but the background change makes the game feels and looks different enough for me that I got the urge to change the gameplay to give it more freedom of control/input.
The game changes from a "point and click and see the result after that" game to a "swipe all you want and see the results in realtime" game, it didn't start as a big addition, but it did change into that over time, because after I changed the control/input system, I realized that it didn't fit with the rest of the elements, and instead of storing it as a new idea, I decided to change the whole game to fit the new control (that feature is a lot more interesting to me than the whole game combined at the time, given the lack of disciple to complete whatever I already have in my hand if it's not fun anymore, the revamp is due to happen, even if it started as a harmless addition/change)