The logical thing, is to just have fewer tournaments. There's nothing, anywhere, that says tennis must have x number of masters/500/250 tournaments. Only that ATP have decided that. So reduce them.
But then you get players wh osay lengthy periods without match play is a bad thing. Like Rafa being off with injury. There needs to be a balance though.
The daftest thing, is they have an 'off' season, after the tour finals, - and then schedule things in it! Like Davis Cup and the ATP Cup.