ADP1047 predetermined loop BW

I read some answers such as "since ADP1047 is designed for PFC, its loop bandwidth is slow".

This is how the traditional boost circuits work.

But why would you predestine a whole new part for such a narrow application?

This slow BW comes from the fact that the output of ALL 60  Hz single phase has awful line harmonics.  Even gazzillion mF wont kill that . BUT there are new topologies that do not have this limitation.

So then how can I modify this predestined limitation?

What is the way to design loop BW according to the power stage? Through the GUI?

BTW:  can multiple ADP1047 chips be synchronized? How?