But isn't that spot pretty malleable? For example, if we had gotten Messi last summer. We would have made space for him by just not registering Carson in the CL squad. And using a club trained keeper as our 3rd keeper.
In other words, registering Carson isn't that important and won't hinder our squad (transfer) planning.
By that logic, isn't any spot arguably malleable? We could omit Sergio from the CL squad , unsure of his fitness, or Mendy, or zinchenk who is suppesdly crap. All moot assumptions.
Fact is, currently there are no free spots.