I think, in short, Dyer and Woodgate's careers have been beset by injuries, and injuries more than other factors have prevented them fulfilling the promise they showed - though Woodgate was magnificent in patches for Leeds, us and Madrid when fit, and Dyer was an important part of a side that finished fourth then third in the Premier League. Bellamy was also an important part of that side, and his career has stumbled at points since and perhaps he hasn't experienced the same sort of highs elsewhere as he did with us; but overall I think he has had a pretty successful career, and I think he actually improved as a player with age, after leaving us, perhaps losing a little pace but becoming a better finisher, and a much better striker of the ball in general.
Jenas is a different issue, because he was really good for us for about a year - for about two half-seasons - after joining from Forest at eighteen years of age, but after that his form fell and he never really progressed as a player. Considering how his career has gone, it is difficult to think that a world-beater ever lurked inside of him - temperamentally he isn't strong and suffers dips in form and struggles to assert himself in games; and perhaps what appeared initially in the eighteen/nineteen year old as real football intelligence was instead just a fairly superficial cleverness. Given how immediately and easily he adapted to the Premier League and to our side when he joined us, given his performances in his first year, I confess that I did think of him then even as a possible future England captain, and thought that with him and Viana we had our midfield set for the next ten years.
To move from considering the players as individuals and charting their careers, and to instead consider them in the context of the period Robson's Newcastle existed, my feeling at the time was and my memory of the period is that Robson did a number of things in his last couple of seasons that didn't serve the team or his young players well. In 2002/03 we finished third in the league, but actually ended that season poorly (at one point, very briefly, the title had appeared a not entirely unrealistic possibility), and from that point I think we were on a downward course under Robson. In a word, I genuinely think that - not out of any sort of xenophobia, but because he had a core of players, was close to some of them, and thus an ideal formed - he became concerned with fielding a team of primarily English players, who would stand precisely as 'his'.
We signed Lee Bowyer prior to the 2003/04 season and started playing him on the right ahead of Solano, who was sold in January 2004. That served to worsen the side and to severely worsen our style of play - Solano for me always linked our play together; and with him on the right, Robert on the left, Speed and Dyer in the centre, and Shearer and Bellamy up front, we'd had an attack with everything. Hugo Viana, after signing for us in 2002, hadn't ever cemented a place in our first eleven, but after contributing significantly the season before, scoring some good goals and providing some wonderful assists, and becoming a fan favourite, Robson stopped using him altogether in the 2003/04 season; persisting instead with Dyer and Jenas alongside Speed even when injuries limited our options, and despite Jenas's form by this point having tailed off noticeably.
In a similar vein, Robson stopped using LuaLua. This was based, I felt, on LuaLua deciding to play international football for the Congo rather than for England (one of Robson's problems with Solano centred round him playing for Peru, which was grossly unfair of Robson and irrelevant given how little the issue actually affected us). With Bellamy suffering an injury-hit 2003/04, Robson partnered Ameobi with Shearer, which was a partnership that never remotely worked - they were both too similar, too static, took up the same positions. LuaLua was the obvious partner for Shearer in Bellamy's absence.
We finished fifth in 2003/04, and the fans were not happy and I think understandably so given not only the loss of Champions League football, but given also some of the apparent issues with Robson's handling of the team, and given the way our play had rapidly deteriorated. That summer we sold Speed and brought in Nicky Butt - which I always considered entirely Robson's doing despite his asserting the contrary - and at the start of the 2004/05 season, Robson began looking to use Bowyer, Ambrose and Milner (the latter two having signed a few months previously) as our wide players, looking to sideline Robert as he'd sidelined Solano, Viana and LuaLua.
We were much worse off for these decisions, which turned us, in the course of just over a year, from a promising team full of options and attacking coherence to a team really in disarray. Viana and LuaLua obviously suffered; but I think Jenas in particular suffered too, played without respite despite his lack of form and increasing tiredness. I think Robson was also too protective of his favoured players, whilst occasionally having a go at Solano, Robert and Viana in the media.