But now he knows the time for bold statements must stop and only action on the pitch will do for the club and its future.
"From a player's perspective, we have a wonderful environment to play, train and compete in. We have a fantastic stadium and play in a great rugby city - the fans are second to none," said Sanderson.
"People say it is down to Mike to get results, but it isn't, it's down to use players to deliver now.
"If anything we have perhaps let the club down the last few years, but our culture is changing and I think we have to be more consistent and more uncompromising.
"If we can do that and produce the kind of rugby and brand that we want to play then we will win games, we are certain of that and we have proven that we can beat everyone.
"What we must do now is do it consistently as a team and that is where we feel are about to change.
"We don't know what is around the corner but, all things being equal, we expect to get ourselves up the league this season," he added.
"We have done everything to date to give ourselves the best opportunity to do that. We have trained brilliantly, the guys are in great form with a great team spirit."
Warriors start the season at Northampton Saints and Sanderson knows his side face a difficult opening day at a ground notoriously hard to gain results at.
However, he insists the stability in the camp this summer - and momentum gained from that - will be crucial to a good start.
"It's been great that we haven't had too many in and out in the dressing room. It means we can continue the momentum we gained towards the back end of last season, which we definitely did," he said.
"We were a little bit unlucky with injury towards the end, which meant we perhaps could not be as competitive as we would have liked in the European semi-final.
"But an element of that momentum we have managed to continue in pre-season. It is essential now we take that into the first game at Franklin's Gardens, that is a tough test for anyone but wherever you go first up is hard.
"You start the first game of the season with everyone pretty much at full strength. That means there is very little to choose between anyone. We are more than capable of winning it, but also know the, kind of effort required to do that."