This is where you could find an amazing foil Expedition, which happens about 1 in every 6 Collector Boosters
Later, to avoid a board wipe or just to switch gears, you can sacrifice those Saprolings to Ghaves other ability, placing +1/+1 counters on other creatures you control
To complete a set efficiently, buying singles is far more economical
Of course, rounding thirds is less intuitive to some players than counting halves, so printing a card like this in paper probably results in some gameplay errors where players just counted or rounded incorrectly
That remains to be seen, but those of us who enjoy the format will find at least one deck to gravitate towards, and those of us that have a tendency to collect a few at a time will be well satiated
Nitz explained that printing such tests was expensive, so it is not surprising that WotC put tests for multiple games on the same sheet