Treasure Hunt impossible to complete F2P, lack of transparency

I was really annoyed to buy the final items in the TH inverse pyramid, thinking I’d get to claim the treasure chest, only to find out that the treasure chest is insanely expensive!! Given that I didn’t even want the prizes, I just wanted to complete the event, I wouldn’t have bothered with the event at all if I knew how expensive the final chest was. 

I only finished the pyramid because I got lucky and got some bunnies with a walkie-talkie excavation in the final hours of the event. Given how incredibly stingy the game is at awarding bunnies, there was just no way to get enough from events alone before the TH expires, unless you spend a lot of sim cash on walkie-talkies and rushing TH events.

Suggestions: Rather than have the event sites unlock by completing TH quests, just have them all unlocked at the beginning. Give bunnies, even if a small amount, at all excavation events. Have the TH quest award bunnies, TH tokens, clues, cupcakes, fashion gems, etc. instead of site unlocks. Reduce the time of the site events, or the cooldown timers for the events, or both.

The walkie-talkie digs seem rigged, as well. The UI strongly suggests that I have 1 in 3 chance of getting one of the 3 prize items, but after doing 20-30 of them, it seems to weight low-value prizes more than the high-value prizes, by a lot. Even when splurging 2k simoleons on a reveal, it should give me 50:50 odds on the remaining items, but it seems more like 20:80 for high-value:low-value.

Having done game development in the past, I know random events spur a lot of superstitious thinking in players, but most players will accept that the random roll is fair as long as the odds are transparent! Given EA’s trouble with “gambling for children” in the EU, I’d think EA would be more cautious about transparency.