It's not a funny thought. The 2nd half fixture list is debatable, United's isn't the worst - for example: City only have ONE home game remaining vs the 'top 8', but I expect them to navigate most of them since they have the best squad / balance this season.
AFC's are a bit better have 3 home games but have a period where they face Munich (a), Spurs (a), Cfc (a), Mcfc (h), Efc (a) all in a row - expect typical Arsenal self destruction month.
LFC obviously has the best remaining fixture list given only 1 away game and only competing in 1 cup. On paper I can't say they'll obtain less points than they did in the first 19 games - I watched LFC's last couple of games and there was a lot of good work (I even cheered a little on occasion, sorry Darkseid - rather City lose). Anyway, I'll still go with LFC dropping from the top 4.. no solid reasoning for this, just hopeful of the title pressure cracking you.
When United (hopefully) beat Spurs next match, United will keep their noses ahead of them for the rest of the season too and from then on it's business as usual in terms of strongly finishing a season. United WILL gain more points than the first half, and I expect the others to gain less. The unexpected points drops were really just expected blips on a radar from a managerial transition - things have improved and will continue to improve.