The boat is small, plain and simple. Putting money into it just puts you closer to getting into a bigger/wider more stable, SAFER boat. It is what you have to work with but it's not that hard to sell and find something else if you look around.
Lost a good friend of mine last year. He was using a 3hp Mercury on a 10' jon. Fished out of it for years by himself. Last year he was on the local lake, calm water. A small "barbecue storm" popped up and generated some wake. The little 10' boat was so unstable that even the small wake from the storm, which could not have been more than 12" in my past experience out there fishing with him, that the boat capsized and he didn't make it. RIP "big John".
I have a 1232 that I throw in the back of the truck and fish out of on lunch break but I guarantee you that once in the boat, I DO NOT stand up, or for that matter move around much at all. It's just too unstable. I had thought about picking up a trailer and then rigging up some pods or sponsons or something to help with it, but then I'm right back to trailering the boat to/from the lake and pouring money into something that'll never compare to my other boat (1548).
Adding casting decks and pedestal seats in a 10' is going to make it even more unstable!
Just my opinions and experiences, FWIW. Good luck.