I think it's just a personal preference thing. Some people prefer one system over the other. In the 4 years I've been doing this I've only had 3 people from memory requesting we change it. I would guess if we did I might get 3 people over the next 4 years asking us to change it back. It's also a very big change. It would mean rewriting the whole thing from the ground up.
I guess we could never know; unless someone comes with some clear data/evidence that a system is better than the other one. I also suppose it'd be too much work to allow both systems to work at users' choice, so there's that too
What I was getting at is how unimportant it is. Out of all the tens of thousands of emails I have dealt with and thousands of posts about us on the forum only 3 people care about this enough to request it.
The conversation above yours got me to think about a lot of things. When I was trying to make the comparison with fiat licenced casinos that can't use provably fair I thought about what would happen in a parallel universe where provably fair had never been invented. Gaming would still have been one of the first things Bitcoin was used for. The casinos would have to rely on the same things the fiat casinos do to establish reputations. But actually, that isn't any different to what happens now. The principles of reputation and trust in business are universal and apply to all sectors.
When people on the forum talk about reputation it is in a very narrow forum centric sense. It bears no resemblance to what reputation means in a broader business sense of the word. This is all background noise that most people will never hear. Freebitco.in wouldn't be so successful if it didn't have a very good reputation in the sense that actually matters.