Pochettino managed to take control of the second half, but luck favored Arsenal. Yes, Chelsea lost two valuable points despite their strong dominance in the early stages of the second half. I was very confident that Chelsea could add another goal during the second half, but fate had different plans.
Chelsea had a decent beginning, leading by two goals, but a lack of experience in certain positions, such as Robert Sanchez's, allowed Arsenal to level the score. I believe Chelsea could have won this match if they played with more experience. They handed the game to Arsenal when Pochettino reinforced the defense while they were only ahead by one goal, which seemed quite unreasonable.
So, it seems Man United is the next one in line that needs to start making some improvements.
In terms of inconsistency, I think Manchester United faces more issues than Chelsea, and the improvements they need to make are even more extensive than what Chelsea requires at this moment.