Yeah, the hot spot was the first thing to catch my eye, then, the vent stack position in correlation to the fire box. The design has numerous flaws.
Most of the heat will be wasted, so it would burn very high amounts of charcoal/lump in comparison to a standard offset design with mods. With the additon of a baffle plate over the firebox, some of the heat could be spread out more evenly to a larger area of the cooking grate, but then, you have the vent stack position to contend with, which would require additional baffle/tuning plates in order to redirect the flow towards the left hand end of the smoke chamber. It would be be a nightmare at best to get this smoker to operate very well at all. And I'm say this after spending over 15 hours tuning my Brinkmann SNP full tuning plate, so I do have a lot of patience and tons of oven rack therms for working out grate temp issues, but I can't say I'd want to try to get that rig up to par.
I can see where the builder was going with the design, as I was tossing some ideas similar to this to convert an old Brinkmann gas grill (retired) to a charcoal smoker. The centrally located firebox plan was one of the ideas I soon deleted from my computer after calculating what would be required to get it to heat evenly. The basis behind this design was likely to get as much heat as possible from the fire box into the smoke chamber. The problem lies in controlling the heat and flow once it gets there. I didn't want to pull my hair out trying to get the design off the ground, so I scrapped that design completely.
I'd wait for something else to come along, or just buy a bit smaller rig brand new and do the mods it needs to do a good smoke with a decent load of meat on the grates.
Eric