While Andrew got the 7684 Pig Farm & Tractor, I bought the new magnets to see if LEGO has improved their minifigure quality in these products, and the answer is: yes, they did!
The minifigs from the new magnet packs (shown below) are indistinguishable from the minifigs you’d find in regular sets.
Whereas before, figures from magnet packs were of notably decreased quality plastic and had loose joints and even printing discrepancies in color. It’s safe to say that LEGO has fixed these problems, but $14.99 for a pack of three figures is still on the price-heavy side.