I feel like I'm missing something... isn't Sail just easy, probably cheap, injury cover?
I think Sail wants a permanent move to Auckland. He badly wants to go to the World Cup, and the Estonians had the best defence in the league last season. Starting there week in week out will strengthen his AW prospects, and he may even win some silverware in his home town.
Wootton, Sutton & Kaltak may all now be at the Glory, but it still ain't looking great there.
Sail is a better athlete than Woud, and I think stronger with his feet, ie better suited to at least trying to mimic what Paulsen provided.