With the current performance I think it is still difficult for Lazio to win Serie A. They have to build a solid squad with a coach who will be with them for several seasons. Lazio can be champions if they have formed chemistry between each player and have players with good individual skills. Currently their performance is quite good in Serie A. I can say they are worthy of being a title contender but I would not put Lazio in the first position. Currently Napoli, Inter Milan and Juventus are the ones who have the biggest chance to become champions this season.
I completely agree with you. Lazio is playing a bit better now, but they are not a team that deserves to win the Serie A title yet. Lazio's squad is not very strong. Lazio has won its last four matches. As a result, Lazio is only 1 point behind Napoli. Lazio is capable of playing well against weak and average teams. But I have seen that Lazio is not able to perform well when facing big teams.
There are also stronger teams than Lazio. Atalanta, Fiorentina, Inter Milan and Napoli are all still able to perform better than Lazio in each team. So I don't think Lazio will win the title this season. However, Lazio has a great chance of finishing in the top four of the table.