in the photo you posted, it is hard to see but it does appear that the heatsinks are the same distance from the fans as previously, however in the photo from the back, the heatsinks are nearly butted up against the back of the case. in my batch 2, there is a 3 inch gap betweent the end of the heatsink and the case. so to me it seems the heatsinks (or modules) are 3 inches longer than batch 1 & 2? or the cases 3 inches shorter? or 2 different case designs in pics maybe too.
Yes your observations are right. For full completeness, I would need to correct my previous post: I swapped Front and Back
Front is where the cold air gets sucked in
Back is where the hot air gets blown out
The motherboard has moved to the front of the machine, where the two LEDs are.
They could have moved the Control Unit up a few cm and place the motherboard under it.
But then what happened to the third fan? Are there only 2 fans in the front of the machine now?
In the previous Batch #1 and Batch #2, the motherboard was placed in the back, where all the hot air
exited. As was the Batch #1 USB hub