Club chairman Helmut Hack went further, expressing his dissatisfaction with their high-profile loan acquisition from Vfb Stuttgart.
"So far he has not been able to adjust to the more robust style of play," Hack said. "I have to say that, so far, he has not been able to fulfil our expectations."
Rojas says the decision to make himself available for the All Whites was not made in haste. After picking up what he describes as a "small hairline fracture", he sat out a week's training. He was then cleared to fly to Asia after consultation with the club's medical team.
"It was always going to be a difficult decision," Rojas told the Herald on Sunday. "I had to make sure I felt OK and they felt OK. I spoke to the doctors and physio at the club and they gave me the all-clear. I started the recovery [in Germany] and continued [in Asia] and it was OK. I could deal with it."
According to Rojas, he also received Kramer's blessing before he left.
"The coach was ok with it. I spoke to him briefly and he was all right. It was good to get games like these under my belt."
It's not the end of the world for Rojas at his club - such relationships are reparable and Wynton Rufer regularly clashed with his Swiss club over international commitments - but he has returned to a difficult situation.
His time at Stuttgart was blighted by injury so he agreed to move down to division two in search of game time but is still kicking his heels on the bench, and may be on the outer. It's hardly the European dream envisaged for a player who was said to be on the radar of English and Italian clubs and was labelled the 'Kiwi Messi'.
"[Leaving] Stuttgart was not something I ever planned on but it soon became clear I wasn't going to be involved in the plans there any time soon," said Rojas, who says his command of Deustch is getting much better and he is otherwise enjoying life in Germany. "I took the decision to look somewhere else for some game time. It hasn't worked out exactly as I hoped but sometimes that happens. I just have to fight for my place."
Bundesliga 2 - populated by Teutonic giants and with less time on the ball - is not an ideal place to relaunch but Rojas remains hopeful.
"It hasn't been easy," he says. "It's a hard slog and quite a physical league. But the A-League and growing up in New Zealand was similar in terms of the physicality. It's not too extreme and something I can deal with. I want to stay there, I want to fight for my place and show I'm good enough to play there."
More than anything, Rojas needs a run of games. He reached heights in the A-League which hinted at huge potential. The move to Stuttgart was probably too much, too soon, but there's no reason he can't find a niche in Europe.
"It would be nice to get back into the rhythm of playing games week in, week out. It's been a long time since that has happened," said Rojas. "You never lose the self-confidence but you also gain a lot from the games you play. You gain a rhythm. I'll have to work hard to get into the team and hopefully I can pick up that rhythm."
Rojas' international future is also up in the air. He had good patches against China but was dragged after 30 minutes against Thailand, with no indication that it was injury related. He wasn't alone in being off his game but it wasn't a good sign.
"It wasn't easy [with the lack of recent game time] but it's something I need to improve on," Rojas said. "It can't be ok one game and then like it was [on Wednesday] for the next. We have a lot of good players now and you have to be doing well at your club to keep getting picked. That goes for me as well."
