Seaby crossed from the Eagles to bolster the Swans' ruck stocks in the wake of Darren Jolly's exit and his early performances have justified the trade.
He was good against St Kilda in round one before starring in the Swans' breakthrough win against Adelaide at AAMI Stadium in round two, racking up 19 touches, 21 hit-outs, six tackles and two goals.
The 25-year-old said his form reflected his new approach to the game and the faith shown in him by the Swans' coaches and players.
"My confidence is a lot higher than what I thought it would be because of the way the coaches have embraced me and the players have embraced me just to get out there and play," he said.
"They've let me go a little bit and I've really enjoyed it."
Seaby said that in hindsight the knowledge that he was rarely the Eagles' first-choice ruck at the selection table had adversely affected his performances.
"The roles were kind of similar, really, but I've had a lot more freedom here. My position's not on the line all the time and I'm not out there just to give someone a break, but I'm really out there to have an impact," he said.
"There's not as much jeopardy, I suppose, which I was starting to feel a bit of at West Coast.
"I still felt like I knew my role at West Coast and I knew that I could have an impact, but maybe it was weighing on me a bit more than what I thought.
"The ability to come here and totally forget about it has freed me up even more than what I thought it might."
With Seaby working in combination with fellow off-season recruit Shane Mumford, the Swans now boast a ruck duo capable of matching it with any team in the competition.
Seaby said friendly competition with the former Geelong rookie helped to drive both players to better performances.
"I don't think my game time has gone up much from previous years but just the way we're having an impact is a lot higher than what it was," he said.
"We're both challenging each other at training and in our reviews after the game, which is good.
"[As a combination] we're obviously very young - we've played three senior games together - so hopefully we've got a lot of development to go."
HMAS Sydney II Commemorative Football Game
Sydney Swans v West Coast Eagles
Saturday 24 April, 2010, SCG, 2:10pm
Tickets from Ticketek
