Alpa - THY - I know - hence the words 'a guarded plus' - it is well to be aware of the function of the RA on ANY A/T mode in the 737, in particular the false <27'RA that killed them..
Re G/A power- the 'first push' gives a CERTIFIED 2-eng g/a power and hence it is 'acceptable' for regulatory purposes for G/A. I reckon you (and all) would be incapable of working out the correct manual N1 for the min 2000fpm climb - right? Hence the need for Full Power on a manual G/A - find yourself an IRE and ask. If you do not do that you should fail an IR (in the UK anyway). I don't know about your 'land', of course.
Regarding your last two points, the answers are in the thread in which you have posted. If you do not know the Stick Shaker margins............................
Merry Christmas to you too.