It'd be awesome to have an option for just the number row, yeah. It usually takes me two goes at it before I can tap in my six-digit number password through bleary eyes upon waking.
As for a question mark key, I just swipe down once on the keyboard & go from there.
O swype down too but that is less efficient than a dedicated key, plus we already have two ways to type a period.
Why not an option to either replace the double tap on the space bar with a? Or replace the dedicated period key.