Maybe I am misunderstanding what you mean by the bottom of the stroke?
I mean when my leg is fully extended, pedal all the way down by the ground. I have had to clip out when my leg is about half way up the stroke (knee bent) in weird situations, and while I could do it, it's not fun. So, I think, no wonder it is hard for a new rider, if that's what you are trying to do.
All I know is I just turn my heel out, and there's no tension at all with the Speedplays.. I understand that turning your heel in would achieve the same thing, if that is what you need to do.
I find when I ride with my campus pedals (dual sided spd on one side, flat on the other), I have to make a much more concerted effort to clip out, even with the tension on the lowest setting. It's not *hard*, but I do think about it more. Personally, I don't even need to think with the Speedplays.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport