OP
For what it's worth -
Nowt wrong with what you've got.
As others have said, is it really doing anything different than 100% global tracker?
But, as others have also said, if you were going to change anything, what would give you similar/better returns for similar risk/sleepless nights etc?
And, as some have indicated, there are a million or more different ways to construct/hypothesise/value/differentiate your investments, but, for the 'average dude' is it worth the time and effort, and are these methods going to be any better/accurate?