A former publican himself, Rennie did joke there was one party who benefited from all the delays, but insisted the man in the middle needed to assume a greater level of control in future.
"It's good for the pub owners - keep people in the pub a bit longer," he laughed. "But it's not a positive, there's no doubt about that. The whole idea of the TMO was making sure we get the decisions right but, in the end, we've got a guy with a whistle and his job's to referee. I think that should be our focus."
There were no such issues in Japan's stunning upset of South Africa this morning, a match Rennie watched with interest. The Japanese captain, Michael Leitch, was a stand-out for the Chiefs this season and Rennie was thrilled for both the No8 and his countrymen.
"[Leitch] is a great man and to lead his country to a win over South Africa is a big occasion for him," he said. "It's brilliant for Japan, especially with all the controversy surrounded Super 18 of whatever we're calling it next year.
"In a pool where you were unsure who would go through with South Africa, they've made a hell of a statement."
Rennie was also eagerly anticipating the All Blacks' debut at the tournament and, after visiting Steve Hansen and his charges, he was predicting a fast start from the defending champions.
"It's the strongest team they can put out on the park at the moment," Rennie said. "I spent a couple of days with them and they're really buoyed by finally getting over there. There's been a lot of talk about a World Cup and they're ready to go. They'll make a statement tomorrow, I reckon."