Wilderness wall. Everyone can instantly see items that have fallen. Technology has advanced. Internet connections are faster and better. I know youtube was popular then, but it really has grown exponentially since. Many people try to make videos to "compete". Duel arena is now available for free to use. Can we keep this up with stake back?
My personal favorite, the old bones yard has gone. I hope this is restored. Are new players aware of some of the places that were used to fight? The castle in the dark was not occupied. I had a much more extensive list, but I am blank. There could be more things that I can add.
Personally, I think this is destroying all the support I had for Jagex. Modern Combat 3 (which is an application) will soon be available. If you don't have antifire, consider getting a DFS/Antidrag shield. Don't do any boosters if you are afraid of dying. Extremes or Turmoil, because you'll end up wrecking yourself.
You can bring Turmoil/Extremes. I'm sure you will require it. Keep an eye out for melee attack. RS Wiki, and other idiots, claim that melee attacks are risky. Melee will also be a big killer (melee the drags themselves use).
Be ready to die. Jagex is finally redeeming Frost Dragons' potential killing capabilities. It could also be excellent practice for TD's/vice the reverse. You should not rage be ready to.