Previously search-as-you-type in Nautilus searched only current directory which served as very handy directory filter. Currently, it does only recursive search. Such recursive search is sometimes (most of time for me) unneeded and eats a lot of resources which is very noticeable (laptop rotating drive, network file system, ...). Please add back an option to current directory only.

Now you can choose between current directory recursive search and "All files" (whatever it is) via buttons on right:

[<dir> | <All files>]

I suggest turning current directory button into two like this:

[<dir|▼> | <All files>]

The down-arrow button would bring down menu to choose between recursive/non-recursive search.

[<dir|▼> | <All files>]
 ______________________
|✓ Recursive           |
|  Only this directory |
|______________________|