Indeed. The fact is that without players like Pires, Bergkamp, Vieira and the like around him, Henry, great as he was, could not carry everything himself - he needed peers around him. And this is why I think players like Messi are sometimes overrated as individuals - although they possess undoubted skill and they are the players you would pick, without a team of good players around them, they are way less effective. RvP has been a good scorer this year but I think this has been due to the overall team showing improvement. While we have had ups and downs, I think there are signs that we have something more solid (with the likes of Arteta and improvers like Kos), Podolski will be a great addition but we need to lose ineffective dross like Chamakh, Bendtner from our books and buy some reliable players who can perform straight off the bat. We have enough learners in the team, we need a couple more solid players - not necessarily fancy names, but good solid and reliable like Arteta. The presence of players like him helping to stabilise the team and keep the younger players on course has a clear effect.
Don't know about that. He dragged us to 4th in 2006, when Pires and Bergkamp had a lesser influence. He also still averaged a 1 in 2 record in his final year before injuries took their toll and his season was cut short.
But as always when big players leave, the dynamic of the team changes and other players start to show their worth.