Hi Nicky, & welcome to the board.
I'm sure if you are able to post a pic of the current WIP, you will receive many great ideas from the members here.
I would say the choice is up to you. If you do not like the look of it, & you have the kind of time it will take to re-do it, that is an option. If it were me, I would leave it as it is for sentimental reasons. If I didn't like the look of it, I would pick out a color in the top and continue with that in a "border" of coordinating fabric to give it a more organized look, using the same hexagon shapes. You could add a couple of these borders if you feel you would like to further organize the randomness.
I inherited 2 such tops when my G-Grandmother passed away. 1 of them I trimmed the edges into a scalop border before completing, and the other I trimmed the edges off straight and floated with a coordinating solid color straight border. Both methods calmed the chaos a bit.
I'm sure you will get many, better ideas; I chose these methods because I didn't have time to do the hexagons, but wanted the tops completed . (I then gave 1 to my Mother and 1 to her Brother.)
Good luck!!