.@HenkeLennartsso Changed in 6.0: Thorim won't trigger the deathball/reset when his arena is empty.- Watcher (@WatcherDev) March 11, 2014
If you're like me, you do a lot of older instances for transmog gear, and as such fights like Thorim are exceedingly irksome because they can only be soloed with certain classes or professions (a death knight or hunter using a pet, an engineer with a target dummy, and some good luck on getting through the gauntlet fast) due to mechanics that you can't really outgear. Now Watcher comes with news about not just the annoying Thorim fight, but this tweet about Valithria Dreamwalker as well.
As a warrior who put together my Shadowmourne via running ICC 25 this past year, I hated Dreamwalker, the fight I had no chance of soloing and no way to get around. Making it skippable would at least allow me to kill Arthas for transmog loot and not force me to stop after clearing two wings. It's an excellent change and one I hope they get in.