APBabySitter.
I understand your concerns, they have been an issue since the start of operations in 2001 and they are very valid concerns. Try being away on course when your latest child is born, has happened to many of us.
Many of us have suggested a change to the way things are done, in order to make the job more attractive. So far nothing has changed, I do not expect anything to change, so the choice is jump in or walk away.
The 787, as things stand, is not an option for newhires, how things work out in the future, your guess is as good as mine. It will probably end up being the senior fleet, at this stage selection is based on seniority for Captains. If this continues for F/O's, well, plan on joining on the 767. I understand the plans are to keep the 767 freighters for a long time.
Trying to be as realistic as possible, not negative.