My hope in this post is for those players to realize that being good isn't something you "are" by default - being good requires you to work for it, and to be able to try your best constantly.
One thing I did want to explore was the difference between Alexander and Coil, and to explain why it is that players who are struggling now managed to do Coil without many problems.
The two raids are intrinsically different, but are often compared with each other - I wanted to point out the difference, and that being good at one does not automatically make you either good at the other, or a good player in general.
I really didn't have a firm idea of it when I started writing, so in a way, writing this helped me to crystallize my ideas - in a way, it was for my own benefit as well. After writing this, I'm more confident in explaining why it is that a good player from Coil-days cannot progress through A3S.