Once you have past the acceleration altitude and set the power management from TO to Climb you do not have anymore the protection of the ATPCS.
On the -600 you just move the rotary switch from TO to Climb and that's it the climb sequence is over.
Should you loose an engine just at this moment it can be very tricky as you need to recognise it quickly enough to have time to feather it manually.
Furtermore the -600 has in my opinion some interface ergonomy can be confusing and with stress I am not sure if the crew could not be confused by some PFD indications instead of reverting to "basic airmanship".
We will see what it comes out from the inquiry....
The ATR is quite underpowered, single engine in optimum conditions is as requested for certification.
In actual OEI conditions, especially with a windmilling prop, I have some doubts if it can maintain level flight and speed.