The new ruck rule has assisted the bigger blokes like Sweet who was our big surpirse this year,The club didn't probably expect Sweet to be as good as he turned out (4th in the league for HOs), and that he and Soldo may have been fairly close in their ability, with perhaps injury/availability separating them.
Probably best he pursues opportunities elsewhere. The success of a ruckman is really luck and timing above all else.