And after a disappointing campaign all round for the Scots that saw them fail to make the knockout stages for the first time in their history, Morrison is already looking forward to getting back to the day job of club rugby for the Warriors.
And he wasted little time in settling back into the RaboDirect PRO12 as he played a pivotal role in the Warriors' 28-17 win over the previously unbeaten Ospreys last Friday.
"The whole World Cup was up and down, to not play in that England game was tough to take but the way that Andy [Robinson, head coach] was looking at taking it one game at a time meant that Sean and Joe [Ansbro] were the combination he wanted for that game," said Morrison.
"I have no problems with that, though there was personal disappointment. Sean has got great pace and can take the ball up really hard. Certainly the way he played against England in the Six Nations was very good and that is something that they wanted to get out of him in that game.
"People have dips in the way they play and, unfortunately, mine came at the wrong time. It is a matter of getting back here (to Glasgow) and getting on with these guys which is where it all started for me and where I enjoy playing my rugby."
And Morrison hopes the best is still to come as he continues to settle back into the domestic game after almost four months away on international duty.
"We have an exciting set of players in the back line here at Glasgow who have done a very good job while the World Cup players were away," he added.
"I'm actually the only outside back to come back in so now it is a case of me trying to fit in seamlessly. The guys around me in the back line have been talking me through what we are doing, and now I need to bring a level of experience to the side.
"Coming back from the World Cup we are in a good position. People would look at the young side we put out and probably wouldn't have said that we would be sitting high up in the table right now.
"It's very positive and the guys coming back are determined to help moving back up the table."
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