The fact is that, if you were lucky enough (of course), you could: Draw 2 cards AND get a 4/4 with just 3 suns. That's pretty insane if you ask me. (specially on early turns like... turn 3!! )
Is like... Clique Peas level of insane. Actually, if you sum it all up you get:
2 suns - Magic Sow Beans, +1 card
4 suns - 16/16 in stats, +4 cards
-------------------------------------------------
6 suns - 16/16 in stats, +5 cards
Even if you divide it, you get a 1 cost 2.5 / 2.5 plant that draws a card (if you round it to closest).
As a quick comparison, you could get 2 3/3 Clique Peas with just 2 suns (pre-nerf).
So... yeah. I agree with the nerf.
Yes, is sad that plants are going to lose a card-draw card, but I think it should be that way.
