what are you shooting most often?
For landscape work, focus confirmation isn't really going to add a lot for you; you're going to want to focus on the object you want sharpest, and possible focus blend shots anyway.
For people or things that move, the AF confirmation will help, but, getting comfortable with hyperfocal will help more. You'll learn to eyeball "oh, that's 1m", etc. Cause really, at f/2.8, unless you are at minimum focus distance, you've got a few feet of focus to work with