Integration of palliative care and early conversations with patients

The research topic involves the integration of palliative care and early conversations with patients who have been diagnosed with terminal illness. My background questions are:
(1) When should palliative care discussions be initiated?
(2) Does early initiation of palliative care conversations promote better quality of life?
(3) What conversations are essential for patients to have the knowledge they need to make informed decisions about advanced care planning?
My PICOT question is as follows:
P (population): patients diagnosed with a terminal illness
I (intervention): early integration of the palliative care team and palliative care conversations by the interdisciplinary team
C (comparison): early palliative care discussions and advanced care planning vs. minimal conversation coupled with aggressive treatment options
O (outcomes): opting out of aggressive treatment and improved quality at the end of life
T (time): the last 6 month of life
In patients with terminal illness, what is the effect of early palliative care conversations by the interdisciplinary team compared to minimal conversation coupled with aggressive treatment options on the quality of the last 6 months of life?
Barriers to the Implementation of Evidence Based Practice (EBP)