I don't know about healers trinity whe have now, but tanks are very unbalance in MT OT role, in 4.0 whe need a new strong OT how match warrior for OT spot, samurái can be perfect for that but if SE choose samurái for a dps spot then meaby i expect templar like a tank, 2 dps in the expansión is so much and whe have a lot of then now.