Just my opinion, but i'd like it if the current top end gear got fully replaced around 57/58ish. You have to remember, they said 50-60 won't just be a quick leveling deal, they said it would take some time. That means there's plenty of opportunities from quests/dungeons to allow people to gear up. Having a weapon or a piece or 2 of gear not be replaced until cap is all fine and dandy, but keeping your ENTIRE set of gear and not needing to upgrade til the new cap... it just doesn't sit right with me. Replacing gear has always been apart of leveling in expansions. I have no problem with previous expansion gear helping speed up the first half of the leveling process but it should start getting replaced at least at 56 and almost fully replaced before hitting cap.

I also keep seeing people talking about fresh 50's going into the expansion...I'm sure the first few quests will be tuned lower and will have plenty of gear to get them up to date if they do decide to make it available to them somewhat quickly.

Again, all my opinion as with everyone's as well since we have no true historical pattern or proof to go off of. I honestly felt like I wasted my time thinking about this but I'm bored so meh