No football team can ever be considered the finished article. We could all list the greatest club sides of all time, from Premier League to Champions League winners, and in each instance you will discover that within weeks of their success they were proactive in the transfer market.
The pursuit of perfection is unrelenting and it is human nature to analyse the flaws that need correcting as much as the strengths which propelled a side towards the biggest honours.
That is exactly how it feels for me watching Liverpool edge closer to the Premier League title.