Well the schedule makes sense.
He's got his exhos in the winter so it'll be good for him to rest and practice bit before the AO. Conditions in Doha aren't that similar to the AO anyway.
Rotterdam was already confirmed during this summer.
Dubai has fast courts, plus he trains there.
Nothing much to defend in Miami, which is probably why he chose to skip it, have a larger training block for the clay season instead.
Skipping Basel is good, there's no point really playing 3 tournaments in a row.