Puzzle/Investigation are only hard on the first few people who do then, afterwards most players get spoonfed the answers by players who did it already. Those are thus better as events usually. Not scratching the idea entirely, but I prefer to be cautious for this kinda thing.
Trap tiles I like, lots, we might try something like this in the future, thanks. We have novice plant maze that is similar to that however, but instead of traps, its don't get close to the plants or die. We have a sortof maze with traps planned for a future quest already.
Retrieval/Delivery/Infiltration/Survival/Defense: might try those someday too, thanks
We have a little Gambling in the Hatter quest.
We have middle gear that give +1 stat, it's from the Nobility system, but I don't consider it weak, considering angel wing ears are worth 15M+ and they give +1 str.
All in all, thank you for the suggestions, make sure you have explored all the hero custom quest before passing judgment, we have many unique features and try to offer a variety, some of the stuff you suggested we have similar stuff already implemented. And I guess we think alike because some of your suggestion we had already planned to include in future quests.