The reason for this is that it was changed to a type ahead. The idea is that you would just type the key word or start of the template you need rather than scrolling to find it.
Manage takes you to the Manage Templates - which is where it has always taken you - to see your list of all templates and can remove them or create from there.
I too sent this in as a ticket. Type ahead is fine if you know what you are looking for. We have 25+ templates and not every team member remembers every name.