What I figured out from the rewards of Prize Wall:
Hero + Red Skill Chips - good, maybe add Red Skill Chips from the start in an equivalent of the first few levels of Red Skill necessities,
Badge Booster Crates - good, maybe would be better if more often offered, but apart from that good,
Cosmetic Crates - same as BB Crates,
Diamond Crates, Role and Team Crates - too little, singular items mean nearly nothing. Would be better if x10 items were offered instead of x1 items,
Gold - a bit too low, but I do understand you can´t give away too much - I would still expect 2 or 3 Millions at least,
XP Drinks - 1 Ultra XP drink makes hardly any difference these days. Old servers need 10 of them at least per drop, while new servers need at least 7 of them per drop.