Sherratt said the change in club ownership had delayed contract negotiations with certain players.
Cardiff was taken over by the Welsh Rugby Union (WRU) earlier this month when it went into administration.
In some cases under existing contracts, Cardiff players are free to move on if they wish as their their deals can be deemed null and void because the region fell into administration.
Budgets are still yet to be finalised, given there is still no signed agreement between the governing body and the other three regions.
But the head coach was clear he wanted to keep Gabriel Hamer-Webb, another who is out of contract at the end of the season.
The wing crossed against Munster – and set up another score – to take his club tally to 10 tries, including four in his last two games.
“What I was most pleased about is that he backed up last week’s performance [at Judgement Day],” said Sherratt.
Cardiff moved up to fifth in the United Rugby Championship on Friday to keep their play-off hopes alive.
“Nights like [Friday] certainly help with contract talks,” said Sherratt, who was Wales interim coach for part of the Six Nations.
“It was a great occasion, the fans really got behind the team and there’s a really strong group here.
“It wasn’t long ago we only had 12 players training, we changed training base halfway through a season, there’s been a change of ownership and we’ve lost about 1,800 caps of experience.
“The group had every excuse to ease off, but where we are now is a huge credit to everyone here.”
