Croly has already decided to axe a number of players from the 2012 squad but he has also decided to keep some of that under-achieving panel on board, as Conor Powell, Gary McCabe and Stephen Rice all signed new contracts.
And now, experienced defender Oman has become the latest Hoop to commit to the club for another year as he's agreed a one-year contract extension.
"I had offers from other clubs in Ireland but I had no real interest in moving when Trevor said he wanted me to stay on," Oman told the Herald.
"We were all very disappointed with what happened last season and the way the year went and I know I am determined to put it right. We had a bad season and I am eager to make amends for what happened in the season.
"There was a lot of expectation on us at the start of the year, there always is expectation at a club like Shamrock Rovers, but it turned out to be a bit of a mess, to be honest. So the squad of players that will be there for next season have a chance to put it right and make sure that we don't have a repeat of the season just gone," added Oman, a veteran of European football who regrets that the Hoops have failed to qualify for Europe next season.
"Missing out on Europe is hard to take, the big European nights are the games you enjoy as a player and it's such a pity we won't be in Europe next summer," he says.
But Oman is glad to hook up with his close friend and former Bohemians team-mate Jason McGuinness once again as McGuinness has left champions Sligo Rovers to rejoin the Hoops.
"It will be brilliant to play alongside Jay again, we always had a good partnership and we came into the league at the same time. We always had a good relationship in defence and I hope that carries on at Rovers next season," he says.
"Jay had a brilliant year with Sligo last season and he'll be a real addition to the side, but there are no guarantees about who will play in defence.
"We have signed Derek Foran as well and he's a class player and the manager might well try to sign another defender before the season starts," added Oman.