What is meant by set it way back? I change the soil of my plants twice per year and always having plenty of room to grow causes them to grow so quickly that I have boxes of extra plants that need homes each fall. The space available for them in my house does not increase but the amount of plant mass is at least doubled every year.
Chelsea, what is your motivation for wanting to change the soil? This plant looks happy, albeit thirsty, with plenty of room to expand laterally in the way of growing new pups.
Some of the warping of the leaves could be from being too dry if the soil is truly getting so dry that there is literally no moisture left in it. Being able to survive a drought does not mean that a plant won't suffer damage from the experience. Sans do not thrive on drought, and will grow much more quickly if the soil is not allowed to become completely dry.
It looks like it is in an unglazed pot, which should ameliorate almost any concern about overwatering. The porous material makes it possible for roots to access oxygen all around the edge of the soil, not just at the surface or drain hole. Unless the pot is sitting in a tub of water, &/or your soil has a lot of silicone "moisture control" crystals in it, there's not much cause to worry about overwatering in an unglazed clay pot.
