Re: How this bowl would work?
The funnel already has good airflow. More holes is not going to change much. The surface are that is being drawn from does not have as much to do with flavor as the surface area that is being heated. But regardless of that with a normal funnel the air is drawn from the whole bowl already.
Oh ya and I can tell you that those bowls would be a bitch to make. They would have to be pretty large to have that number of towers in it spaced so you could get tobacco all around them. Check out the superchief bowl. The idea is kind of similar to what you are proposing.