I'm extremely impressed by our actions so far in this window - we're pursing players who fit Pep's style of play, who fill much needed gaps in our defense and once the window is complete, will improve depth so that we have high quality players as backup. Moreover, we're moving quickly, beating competition to our signings, bringing in players early and giving Pep a full off-season with his squad to train them.
So it's not surprising to me to see the we're favored to win the title next year. That said, our league has top managers in all 6 contending squads (perhaps Arsenal the exception). Next season is likely to be extremely competitive at the top.