I also feel that Tournament Prizes are heavily rigged and bucks have been reduced from packs. Believe me I was there when the game first came out, every battle stage was an unlock and you could stop the spin wheel yourself.
Now when I returned to actually play properly and focus on this game as a unique one rather than a side-game in the whole list of other games in which I didn’t even make good progress, the game changed for both the better and the worse. The spin wheel rigging falls under the worse changes. Then again, I’m fully in favour of @Schmoo’s statement. Even if not the spin wheel, I’ll make it a point to not rely on secondary prize sources (spin wheels, less-than-1% chance cards, etc) and instead focus on unlocking it using a strong Dominator League finish.
Though it would be awesome if spin wheels were changed back to how they were before, and if they kept bucks back how they were originally, I find it equally fun as to how it is now.
I’ve felt like quitting so many times seeing three-fourth the original battle stage creatures locked without events. Yet I still like the challenge of maxing them up, that satisfaction is a whole different level in itself.
@Sionsith pointed it out correctly, the spin wheel is nothing but a kind of mental incentive for the player to do one more round.
In fact, I carried the opinion that spin wheels in JWTG were genuine and got disheartened so many times seeing myself land one spot away from the main prize (before I came to the forum). Even now, sometimes when I land one spot away, I do feel a little sad since that mindset of not-rigged-wheel hasn’t fully vanished. Still, the Dominator Finish is more than enough to get that adrenaline rush.