To repair drought damage, or not?

Hi I am after some good advice. My semi-detached house is on dynamic clay soil and has suffered from a lot of cracking because of the drought (as have a lot of other houses in my area). I had a soil report done in May this year costing $1000. The guy who did it is a leader in the field. He advised cutting down some trees and waiting to see if the house settled, which I did. There are no new cracks but they haven't closed up either. I've had a builder over who wants to get a Structural...

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