You can enlarge the image on the 2" screen...it won't buy you everything, but it will help...with AutoFocus, you need to be sure that the camera is using the focus point that you want on the part of the image you want in focus...
Take a look at some of the threads here on back button focus. I have my cameras set to back button focus and a single (usually the center point) focus point. I use the back button to focus that point on the area I want in focus and then I have my focus set...I can recompose the image as I wish and it will still be focused on that point...I use it all the time, but it is quite valuable for some sports shots - such as good focus on the batter and then recompose so I can get the view I want...If you are using the shutter button for focus, especially with lots of focus points, it can change the focus point to one you don't want before the shutter is fired...
Here are two images as examples...the first with my D4 and 105 Micro...to me it isn't perfect, but it is certainly close...when zoomed in it looks like the focus is more on the flower the bee is on rather than the bee...
The other I shot down in FL - loved the lighting and focused as Dean suggested above...I don't remember if I used my 105 Micro or my 24-70...I think it was the 24-70 though...
To me, it really doesn't matter if the shot is of a flower, a landscape, a bird, animal or person (moving or not), the goal is to get tack sharp focus on the critical part of the image and select an aperture that will give you more or less in (or out) of focus area to make it the best photo possible...with sports (and with other subjects at times) that means subject in focus with enough blur in the background so that the subject pops from the image as below (D4, 200-400)...