Enzo Maresca has made big difference for Chelsea making team more stable. Their recent win away against Tottenham was very impressive as they were able to come back from giving up goals easily and win 4-3. Chelsea played especially well in second half controlling game and showing how consistent they can be. Even though winning championship is still difficult Chelsea is playing better right now than Arsenal or Manchester City so they have good chance.
It's not about whether it's difficult or not, but rather how Chelsea can continue to perform consistently because catching Liverpool is quite difficult. This season there have been many changes made by Enzo Maresca and he has turned Chelsea into one of the strongest teams in a faster way. This is a very extraordinary achievement for him because last season we could see Chelsea's inconsistent performance. The league is still quite long and maybe there will be unexpected surprises that will happen in the second half of the season, Chelsea can take advantage of the conditions but it really depends on their level of consistency in maintaining their best performance.