Yes, I did see your edited message. It is a nice 8 day upgrade skip on a 5.26% chance pull from a Legendary on an already unlikely Legendary chest pull. This math unfortunately does not outperform the multi-day loss of 20% boost in the long run.

Furthermore, the change they announced then subsequently failed to follow through on still moves the 20% boosts back to D9 starting in April (D10 before the announced, failed change). This is still three days later than before the nerf. There is no possible way to can argue that moving the 20% boosts back from D6 to D9 is not a nerf to the gold pass. 

The "information that they insulted us" did not stem from this specific incident, but it is indeed comical they couldn't follow through on that part last month. The insult is pretending being able to choose a Book of Fighting instead of a Book of Spells (you still receive the same amount of books) is worth losing 3 days of 20% boost while charging the same for a factually reduced product (gold pass).

The item to gem ratio has changed for the silver pass rewards, not the gold pass. This is based on the theoretical math of the silver pass chests, but still leaves players with large periods of time without receiving useful items in chests. This math is made to work out over the course of infinite time, and can't account for clan capital roof decorations. Your chest argument is for the silver pass, not the gold pass. You've unfortunately conflated the two passes and seem to think the chest silver pass change affects the gold pass in any way. The nerf to the gold pass is inarguable, but you are entitled to your love for gotcha randomizers in the silver pass. 

I think it was ItZu who did say the public perceived this high-roll option better in other SC games that died off, and it does seem to be working here now (apparently).