Time off of work or time in the woods is a valuable commodity for most hunters. So if your time is limited, it's important that you chose the most productive time to hunt.
We have better success hunting the 2nd half of the season. IMO, there are only 2 real advantages of hunting the first half. One being that there are more gobblers to be had and two being that you can hear them from a greater distance. The disadvantages of the early season are, gobblers are with hens, they can see you from a greater distance and hunting pressure. The advantages of hunting the late season are, fewer hunters in the woods, (especially public ground), the foliage makes it easier to get inside their comfort zone undetected and the majority of hens are setting. The disadvantages of the late season are, fewer birds, harder to hear with the foliage and bugs.
Late morning and now afternoon hunts are far more productive in the late season. Especially for the run and gun style of hunting. If you can make a bird gobble later in the day, your chances of calling him up are far greater in the late season.