It's interesting how ideas spread through a group. Just by talking and reading. The idea that Egan has bad service is fundamentally flawed yet is spreading like a weed.
I think you'll find the view that Egan has poor service has been around since he debuted in first grade. Problems with his passing from dummy half has also been remarked upon by commentators from time to time. Sione Katoa has the best service of the three (I am not saying that alone makes him the best hooker), but the problem with Sione is that his decision making is suspect as he tires, and that happens pretty quickly. However, his passing from dummy half is sublime.
It is also pretty clear that Ivan sees Kenny as the better option between Egan and Kenny - you don't start your first choice hooker off the bench.