Curious to see how you divide the 4 stages of Leo?s career.
Personally,according to his career narrative, I would say:
2005-2008
2009-2013
2014-2017
2018-2020
2021-...
Based on his playing style:
2005-2009(dribbling god winger)
2010-2014(false 9,goat scorer)
2015-2018(MS(N) era)
2019-2021 and onwards(physically declined but with excellent IQ and understanding of the game,paired with improvement of his long shots)
Thing is that his dribbling explosiveness goes beyond his initial pure winger stage (in Wembley for example, he was killing United on nearly every dribbling run, United just couldn't cope with that combination of elite skill, footwork and speed). So, if we don't count the fact that he was playing on a different position for much under Pep (false 9 stuff crept in as soon as 2009 which made the Ibra transfer so dumb – since Eto'o was brilliant at moving wide to make room for Messi's center activity, check the Rome header from exactly the "9" space), the 2005-2012 Messi is the lethal dribbler in the last 3rd Messi. Also helped by the fact that 2008-12 was basically the peak Xaviesta era, where we basically OWNED the midfield battle, no matter the opponent. So Messi had very little reason to try and drop in midfield. He still did that, but it was much better timed, and those set-ups were basically synchronized to perfection by Guardiola.
You have highlights from 2011 where his speed and dribbling seem to me just as explosive as in 2007 (where he seemed to embarrass the most players).
Then, after Pep, the team lost basically its architect, so managers who were not as good started to use Messi as a sort of do-it-all joker player. So we started to look less cohesive with each season. Tito made everything about Messi really in midfield and in the last third basically. Played a part in the reason why he basically snubbed Thiago that season.
Then Lucho came in and we assembled the trio, and Messi got back to what was always his best role in big games. The winger-false 9 position (more winger than false 9 since Suarez was never quite as mobile as Eto'o and Lucho was a way more conservative manager compared with fluid-total-football Pep), with quite a lot of time during games spent on the right flank. This Messi was very similar to 2009 Messi.
Then with 2016, he started to be more of a playmaker and less of a winger, remember being very pissed back then that Messi just couldn't stick to that RW role more that season. MSN started to be unbalanced in the big games.
And with Valverde he kind of drifted into a role I didn't like very much, but which was inevitable with age. He started to take over the AM role, but with not quite the work rate needed to shine in the big games consistently and make us dominate the midfield (that was basically why Messi could never be a Xavi type, he walks too much whereas Xavi never stood still, was always on the move impossible to mark out). He still had those big-game performances, but also quite a few performances where he didn't deliver as expected and was rather underwhelming.
The Koeman Messi is similar to EV Messi, but a bit more advanced on the field, which is better. But is older, so that's obviously a problem.