Set up question

Hey guys. So I've recently been trying to investigate why my drives are so unpredictable. I tried the foot powder method and noticed that I consistently strike my driver on the heel of the club. Since then, I've been setting up to the ball roughly 1/2 a club length distance infront of the ball and it's been working beautifully.

I'm excited that my drives are much better, but I'm also wondering what the cause for this might be. I can still strike my irons reasonably well, the issue seems to be with driver and fairway woods.

I don't try and kill the ball, I'm a R handed golfer and I'll usually shoot between 100-115. Any advice would be appreciated! Sorry no swing video at this time.