Jason was always curious to figure out new things and he was intrigued to hear about the possibility to customize his soul world,, even if it may take a while before he would be able to do something like this.
Mark said that there was no benefit in it, but Jason felt otherwise because Gabriella said that it may strengthen the soul connection between him and his soulbonds, which was definitely a huge advantage!
Because he had already formed two fortified soul conjunctions with a different and firm connection, Jason was fully aware of the positive aspect of a firmer soul connection, even if it may not seem much from others' perspectives.
The difference in manifesting his soulbonds body parts when they occupied his mana core alone was more than enough to tell him that a firmer soul connection was important, while the same seemed to apply to affinities.