Hello.
I have had experience with both the clubs you mentioned, so I'll share my thoughts.
The L59s really do have a lot of hype around them; rarely will anyone tell you to wait for sometging better. With that, I bought them and loved them. For one thing, they are a great stepping stone into all the other high trajectory clubs; I'm sure you are getting some good experience with wind aiming:-)
I didn't try the Callaway Apex irons, but I did try the old Nike equivalent. Despite the low trajectory, I found they stopped suprisingly well. They were also a tad more forgiving than the Pings since they didn't travel as high.
I'd think you should continue with your Pings, simply because the trajectory makes them more versatile. Long irons more manageable, uphill approaches more consistent.
Have fun!