I have a picture around here somewhere of a Ethiopian traveling blacksmith, brazing a bicycle together using a cow patty as fuel. He uses an over inflated bicycle innertube as a "bellows" and meters just the right amount of air to oxygenate his fuel. Having lots of innertubes around here, I tried that with esbit and alcohol stoves....yeah, they get crazy hot and burn your fuel faster. So, I suppose 'jetting' esbit would provide a more direct and hotter flame, but you'd also consume your fuel quicker and end up with a stinky/gooey mess in whatever your using as a stove. Capturing the extra heat is the tricky part.
As previously mentioned, the simplicity of Esbit is hard to beat. Light it, kick back, cook. I don't mess with alcohol anymore....it's fun to build the little stoves but Esbit is easier to use.