I agree this will become a trader's cash cow if this is the case, if you look at the trading dashboard seldom you see that the majority of bettors won on one option, it is always a mix and this is proof that the trader or gambler or even newbie your chances is equal like all the others, a trader may have a run of good luck on his bets but next time it's the gambler type of guy's turn.
That's the reason we call this game as gambling as that falls to the luck based game. you maybe a trader, good at it, but you can never predict accurately the prices movement in 15 to 30 seconds, its just lucky that would be able to help us win on this game and there's no way they'll change the nature of game when the favor is on them. No casino would give its gamblers the edge, it's always on them as they need to be profitable in running their business.
Suggestions are good by the way, but it's up to the casino if they'll change the current system they have. If I'm on their shoes, I would not bother changing into something when the business is running smooth while the game is still fun to play.