I groaned every day after logging in and after trying to reroll them on my two accounts. Wednesday I only had three 50 gold quests, making it impossible to play without losing gold. I did all three at once and tried to compensate by playing a lot and winning.
Since then days I consistently get 60 gold quests again. So no need to reroll them.
It's random chance. Bad streaks happen. Do you really think, in the tens of thousands of people active on hearthpwn, every single one would get at least 1 60g+ quest every few days?
Also, 10g per day is 2 packs every 3 weeks. A while back most quests were either 40 or 60 gold, with an average of 50. Now, IIRC, 50-60 gold quests have the same frequency, so it should be an average of 55. Not including the more valuable quests. Why does everyone complain about free stuff?