All the Rogue draw spells seem to have their advantages and disadvantage. Gang up requires you (or an opponent) to have an existing creature on the field so it actually costs more than it appears if you want to set it up yourself and only gains you card advantage of 1. The cost of Gang up entirely depends on the cost of the minion you play but you get the advantage of choosing what creature you want to make copies of which makes it a bit more powerful.
Another card to consider is Burgle. High RNG chance, gains you 1 card advantage but is also kind of limited and highly dependent on the class you're facing.
Thistle Tea costs more more all in one go and has more of an RNG aspect but you get 2 card advantage. Thistle Tea also only puts you 1 card closer to fatigue unlike Sprint which puts you 4 closer, it leaves options in your deck and can potentially replicate very strong cards.
I'm unsure whether I think this is a good card yet but it's certainly a very interesting way of drawing cards.