I see the benefits of the templated familiar, but I'm still not a big fan. Different animals used to have a unique quality to them. The template technique feels very "samey" to me. IMNSHO, there should be more mechanical differences between a hedgehog and a corgi familiar. YMMV.
Also, scouring through source books for things like unique familiars (or creatures, or spells, etc) has traditionally been something I enjoyed about character creation. Reading through a book with eyes searching for a specific build is both fun, and a good way to explore the material deeper. Admittedly, these days I'm more likely to Google first and scour later (and less). Maybe that's part of the reason for the change.