If a spell on the stack has split second while you control Teferi, you can't suspend creature cards since split second stops you from casting them, even though suspending them is a special action
I suspect the absence of a guaranteed rare in Value boosters is, in part, specifically supposed to deter collectors, so that these boosters stay in stock for kids to buy
For reference, Food Tokens themselves are not much to write home about
COLLECT SPECIAL TREATMENT CARDSEach deck also comes with a 2-card Collector Booster Sample Pack containing 2 cards from the Bloomburrow set, including 1 alt-border Rare or Mythic Rare and at least 1 Traditional Foil card
In that brew, your dying things will kill without anything from your deck
If the exotic cards like Magus then I would be looking to replace them with some disruptive tutor targets or indeed more dig effects