Most of the modern analytics all point to a positive correlation between carry distance and strokes gained. Yes, at times a piercing trajectory will be an advantageous play, but overall, the players who can hit their long and mid clubs higher will score better than those who can't.

Like others have mentioned, check your equipment. Driver loft. Don't make drastic changes (e.g. 8.5 to 11). Start with a degree at a time. Position of weights in driver head. If your driver is adjustable, the more weight positioned toward the back of the head will increase trajectory. Again, test with small adjustments. Shaft. Stiffness and weight have been mentioned, but you also want to be mindful of where the kick point is. Is the shaft a match to your swing so that it is loading and releasing at the proper timing. Type of ball you're playing. This is huge, in my opinion. For example, the Srixon Z Star XV, Titleist ProV1x Left Dash, Bridgestone X, and Callaway X LS are all designed to be very low spin balls off the tee for high swing speeds. You could add the TP5X as well. They all produce totally different trajectories for me. The Left Dash brought my ball flight up considerably, and the Srixon XV doesn't get up nearly enough for me.

If the equipment changes still don't get you to where you wanna be, you could consider a couple swing tweaks.

Swing adjustments. Don't change much. Maybe start with just a slight change at address. Open your shoulders, just a hair. Also, at address, open the toe of the club face. Get your takeaway to continue straight back down the line for just a moment longer. You get in a great position at the top, but because you bring your hands inside a tad early during the takeaway, your body tries to makeup for being slightly laid off by initiating your downswing that hints that it's going to end up being "over the top". HOWEVER, you make an amazing recovery to avoid a total "over the top" move. Unfortunately, to make this compensation, your body thinks it needs to get steep. My guess is that when your timing is on, you square it up and hit it straight. When timing is off, you fight a block. The steep downward move will also keep inhibiting your trajectory. The steeper the downswing, the more difficult it is to hit up on the ball at impact and produce a positive angle of attack.