The stale meta really NEEDS to change.
1) Barb's only use in meta currently is pulling support. Why is there not a valid DPS option. With a major patch, this should be a design focus.
2) Witch Doctor currently is dependent upon the Sacred Harvester and Lakumba Bracers to maintain acceptable levels of Toughness for end game content. This is far too restrictive and needs to be changed. This would also open up more builds for players in solo and group play. Otherwise WD is almost in a very good place Jade (too squishy for groups), Firebats and Gargs all performing fairly well.
3) Crusader is completely missing from the end game meta. The already inferior support abilities were nerfed to the ground. Both multiple DPS roles and a valid support role should be developed.
We need a lot more use of the the Legacy of Nightmares set and thus we need more ability enhancing legendary items. LON is the best thing Diablo has going for it because it provides room for an amazing level of creativity if you have the tools to experiment with.
Give us those tools Blizzard!