Direct-FET packages do look nice on paper, but you really need to have a professional assembler soldering these to your board properly in order to benefit from the advantages. Without X-ray inspection after the solder process, you just can not tell how well the solder joints under that metal package turned out. Maybe it works well at first, but once you put the driver under full load a few times the half-bad solder-joint will give up (thermal stress with expansion/contraction) and a lot of your drivers allways fail after the first few rides. (I'm shure that would not make anyone happy
Since the project was more born out of a DIY setting, it makes perfect sense to have a FET package that can be soldered somehow at home with accessible tools and still have some way to control the quality of the soldering.
Of course, if you are aiming at a large series production from the beginning, and actually do what I would call "design for manufacturability" and not just "design for functionality and simplicity", direct-FET can be an option. But if you want to go down that route, you better make shure you know what you are doing and especially who (and how) assembles and inspects your boards. Once you are on that path, you will start to think about cost to manufacture. And difficult to solder packages associated with increased production failure rates, expensive/difficult rework options and all that nasty stuff no DIY project ever deals with can actually again drive you right back to the standard packages. Or you tolerate the increase in cost associated with that technology, if you have no other option, and can somehow push out that cost to your customer with higher product prices.