Okay, autism time on pulling vs hoarding.

Assuming you have full set your pulls give you:
1 card on average ~41 vials
10 packs (80 cards) on average ~3280 vials = almost 1 lego of choice

Assuming you are pulling for the new set
10 packs average to:
1.2 random lego
4.8 random golds

Real number are probably higher due to some rarity bonuses but the correlation should remain the same.

So pulling on full set vs pulling on new set is 1 lego of choice and nothing vs 1 random lego and 5 random golds (and whatever random silver/bronzes) per 10 packs.