Then, Shanklin's misery was compounded in midweek when the 66-cap star was ruled out for the rest of the season with a knee injury picked up against Ulster in the Magners League.
It is another setback for the injury-plagued Cardiff Blues ace and has wrecked his hopes of reclaiming his place on the two-Test summer tour with the All Blacks.
The injury blow will increase Shanklin's spell on the sidelines for Wales even further, but Mark Taylor reckons the doubters should write the experienced Shanklin off at their peril as he has a pivotal role to play.
Lions and Wales centre Taylor, 37, said: "There is no doubt that Tom is still good enough for Test level and has a number of excellent years left in him.
"He has been a great player who performs superbly every time he pulls the Welsh jersey on. He was one of our stand-out players at the 2007 World Cup and has never let anyone down.
"Tom brings a great attitude to the game, he is very good and strong at the blitz defence that Shaun Edwards is very keen on.
"He's a communicator on the field and he is excellent with ball in hand. He has had injuries but it's far too early to write him off.
"Warren Gatland will know he's a useful player and one of huge benefit to have in the squad because of his consistency, experience and versatility."
Shanklin - twice selected for the British Lions - endured a frustrating Six Nations after he was axed for the opener at Twickenham and an unused replacement against Scotland, France and Ireland.
Even France defence coach Dave Ellis highlighted the value and impact of double Grand Slam winner Shanklin following their victory in Cardiff.
But that did not stop Shanklin fearing he would miss out all together before playing the final 18 minutes of the championship against Italy last month.
Taylor knows too well about the changing of the guard in midfield having seen the likes of Shanklin, Gavin Henson and Sonny Parker force their way at the end of his 52-cap career.
Wales Under-18 team manager Taylor added: "It is hard because you know you're time is coming to the end and Tom's chances will become more restricted.
"I wasn't desperate but you would do whatever possible when you got the opportunity to stay within the set-up. I'd spend more time on video analysis and made sure I looked after myself.
"And as you get older it becomes important to help the younger players because you can use that as a way of extending your stay in the squad.
"If the coaches see you helping then they will turn to you and ask questions. It can prolong your time.
"Of course, you don't want to see players in your position doing too well but the most important thing for any squad member is to see Wales win."
Following Shanklin's third knee problem in as many years, Roberts and Hook are expected to form the first-choice centre partnership against South Africa and on the tour to New Zealand this summer.
But Taylor, who toured with the Lions in Australia in 2001, insists you cannot discount Shanklin's experience when he returns to full fitness.
Taylor said: "Jamie is a big threat but he has not reached the level he achieved with the Lions. I'm sure he will admit that as well.
"James is in an unfamiliar position but they are starting to link up well. But sometimes you do need that extra experience. Wales will need Shanklin moving forward."
It is eight Tests since the 66-cap star started for Wales, against Samoa in November.
In that time Jonathan Davies and then Hook play alongside his Blues partner Roberts, leaving Shanklin worried.
He said: "I guess Warren and the coaches just went with what they think is the future for the World Cup.
"It's disappointing when you're not playing but at least I'm still involved. They know my strengths and weaknesses and I think I'm playing pretty well.
"I have to keep my form going and then hopefully the Wales call will come. I try to impress every time I play so I would be more worried about not playing for the Blues.
"They are my employers and if I'm not playing regular club rugby, I would have no chance of playing for Wales. Now I just want to play as much rugby as possible."