nice mod (I'm currently testing three similar mods at the same time and they work relatively well together. i don't know whether it's good or bad that the pallets from this mod overwrite the pallets of the "pallets" mod (and thus are made of steel and used for the wooden looking other pallets), but who needs two very similar mods at the same time?
for "simple" (one type only) pallets, i wouldn't like to have new assemblers which don't need separate (un)packing: the additional complexity of using pallets would be gone, and the same effect could be achieved as well by using faster belts (lots of mods that offer that) or "simply" scaling ore etc (miners dig 1 instead of 10 ore, smelters smelt with the usual ratios but need 10 times more time, and all other recipes need only 1/10 of the plates they normally need). and you would have to make a lot of such new assemblers (and smelters and chemplants, etc) since there are the vanilla assemblers, faster assemblers, mini machines and many many more.
having "mixed" pallets sounds nice, but what would be the advantage? when i need to collect and package all those items at one place first, couldn't i directly USE the items (in an assembler etc) instead of packaging them (in a total of 3 assemblers for packaging, unpacking and using them?
i already had a similar idea, but much more complicated, including a new method of transport: small selfdriving vehicles that collect and deliver stacks of items (on pallets), exchange them (join or split) at "repackaging stations", eg MK1 for single stacks near machines, MK2-4 for 2/4/8 stacks and medium distance and MK5-7 for 16/32/64 stacks and far destinations at high speed, finding their way by following marks on the ground (turn left/right marks, else go ahead).