Hmmm, I generally dislike titanforging, but not with a lot of passion. It's frustrating because trinkets are badly designed throughout the expansion, so old titanforged trinkets like the unstable arcanocrystal end up being stronger than current raid drops. But I'm not hardcore enough to actually run old content for the sake of that titanforged chance.
However, when a raid drop titanforges I tend to like it overall, even if it's not a piece for me. But that's just because I'm not gambling for extra chances, it's on raid content that I would run anyway.
I don't think the developers should try to cater the system towards the high-end mythic players, so they are probably pretty happy with titanforging. I don't have anything against hardcore players in particular, and I do some mythic content myself, but the high-end portion of the playerbase will always do whatever they can to cheat the system in their favor. Split runs aren't a feature designed by Blizzard, the players started doing it on their own accord to game a lockout system that was intended to slow them down. Blizzard doesn't want you doing split runs, but also can't stop you from doing them, and they are undeniably useful for gearing up fast. Out of WoW context, if you have a small group of people trying to rig a system in their favor, they are not the audience that you want to please when you design the system.