Hematocrit decrease doesn't mean improvement in assesment?

hematocrit decrease doesn’t mean improvement in assesment? i mean in assessment we are also considering hematocrit

Not necessarily. Significant Hematocrit Decrease means either you have overloaded the circulation with crystalloids or blood is lost internally which you can only manage with BT (not with more crystalloids as it will rather worsen the condition). If Hematocrit you found increasing significantly then it means plasma is leaking internally so to retain it inside vessels we use plasma expanders like colloids