There will always be talk about aspects that Messi needs to improve, even when were talking about a player who is arguably the best ever and in such a consistently unrealistic form.
Years ago he would try and dribble more players at once, more often. True, but he in fact evolved that pure young aggressive attitude into a much more composed and well calculated one.
It may seem a bit less flashy in the end but, it benefits the "team" and keeps him fresher for the 90mins, he does attempt to dribble many and succeeds like several recent brilliant runs and goals (CDR final last season for one), Its obviously not a question of can he but will he taunt more chances rather..
But Messi over the last 5 or 6 seasons has traded off some of those runs with his curved passes or through balls, frankly I am glad of this shift as I think it benefits our team in the end.
Messi always seems to not have as much stamina as many other players out there, he would tire and sometimes throw-up etc... Think it didnt take long to know you need to adapt and not go empty tanked too often, I'm sure we can find many points about Messi or any other player that they should improve but if they do, we will then find others..