I think it is great to see a range of profiles. For what its worth, I think that the profile does make a difference.
When I first started using senior bats in the late 90s, bats generally had much lower middles than they do now. This is my first SH bat. It has a very low middle and a very thick toe compared to what you see on most modern bats.
I don't think that playing conditions have changed such that there has been a need to vastly alter the profile of bats. For me, it came with a trend to using lighter bats and towards bats with bigger edges. The compromise for this was first higher middles and concaving and then more recently duck bill toes.
Personally, I prefer a lower middle. No doubt you will hit balls higher up the bat when you are defending and pulling and cutting where you are deflecting the pace on the ball. But you need the most power when you are planting the ball back over the bowlers head when you are hitting the ball low down the bat and for that I prefer to see the biggest part of the middle to be in that area.
Luckily as someone who uses heavy bats, I can opt for a lower middle, with big edges and without concaving but otherwise you have to make compromises.
Congratulations on the imminent arrival!