I don't disagree with you, Teal Blue. I actually am in favor of the editor being in from the start because of the fact that if people use it to cheat, then that's their responsibility. In my opinion, cheating typically is only going to ruin the game for you, or result in a less satisfying experience relative to how the game was meant to work. I completely acknowledge, for instance, cheating in AI War or playing with the debug options in valley 2 or whatever to have their own fun elements... but to play the game with those features, that'll ruin your experience. If you willingly do that to yourself just because it is an option that's in the game, you have no right whatsoever to complain... so any complaints on the topic that Chris could see would just not be valid in any way. I've seen this too many times, I've seen so many people who whine about exploits in single player games or who complain about having read a walkthrough spoiling the gameplay. Viewing the levels in the editor will do nothing but basically work like reading a walkthrough. People will probably complain, because that's kind of what they do. I was making the argument that complaining about some in-game way to look ahead is not valid at all.
Another major complaint, mouse control and Valley 2, I actually can see the other side and where it comes from. If the concern is that people will flip out like that again, I seriously doubt that they would. Me personally? I felt like Valley 2 wasn't perfect, and the controls actually made it play in a way that I just was not compatible with. I also could absolutely understand if somebody argued against the lack of mouse control. Compare this to Ratchet and Clank, which didn't include a strafing control for most of the game. That is a game that was made challenging because the controls were not at the generally accepted standard. While that isn't inherently bad, it is something that people can absolutely complain about.
The possibility of a player looking ahead and getting advanced cheaty scouting via level editors? Hey, you do that, that's on you. It isn't a bad design decision. In some cases it's the player's responsibility to allow the game to be a challenge.