What would you need cheats for?
You already have unlimited money and everything you need in sandbox mode..
Agree, people complain the management isn't enough of a challenge and then others want cheat codes that make pretty much eliminate any challenge. I don't envy developers trying to figure out where the balance is.
Sandbox fans want one set of things and management fans want a different set of the things. Challenge mode and career should be completely void of cheats (and by cheats.....I mean things that make it easier, not "features" like tegidcam). Where's the challenge when you can build a lousy coaster and the people will still pay and ride it? Why bother playing challenge mode if no matter what you do, you make a profit and continue to build your park? There's no challenge if there's no way to lose (go bankrupt).
As far as I can see the most worthless suggestion is "Research everything for free." Why would you even play challenge mode if you don't want to challenge yourself? Come to think of it, this one is already in the game : Just save your challenge/career park and then open as a sandbox. Done.....all items researched for free. That is what sandbox mode is for.
I don't have issue with anything being available in sandbox, but Career/Challenge mode has to be cheat free or you might as well eliminate them from the game. I know.....I know......"Don't use the cheats, if you don't want to." I respond "don't play career or challenge if you can't deal with the challenges without cheating." When I see a great challenge park in the workshop, that person deserves a little credit in the work required to get there. If cheat codes make it easy to build the same without the effort, it's a spoiler.
Bottom line: Don't ruin the challenge/career mode with game breaking cheats.