edit: Blizzard indicate the are going to replace the last 6 packs with a total of 1350 gold. This means these graphs are not currently accurate. Though I still maintain even level 50 is less gold than just quests in the old system (now 5,450g vs 7260g), and for far more effort.
One of the causes for confusion when people are assessing the new rewards track system, is that it's not clear how much gold XP is worth.
This is complicated by the fact that it changes depending on what level you've reached.
So using data from https://outof.cards/hearthstone/2200-the-rewards-track-how-long-to-get-to-level-50-644000-experience-required-to-get-to-level-150 I've charted the data - though I might be out by 1 level. This chart averages the value in gold of 1000XP based on what level you finish on the rewards track. Example:
If you finish at level 50, your 192,200XP equated to 21.85 Gold per 1000XP.
This is in contrast to the early levels which go as high as 78.43 Gold per 1000XP, or level 100 which nears 30 Gold per 1000XP.
I only went to level 100, because quite frankly, unless you are example 1 in Celestation's 2 examples from his twitter post, and play 5 hours each and every day (i.e. a third of your waking life), the vast majority of people will get no where near level 100 let alone level 150 unless changes are made.
edit: gold reward graph scaled by XP, marking levels 25,50,75.
gold per 1000 XP where the XP of non gold reward levels is accumulated until gold is rewarded for an average:
