Many of the ultimate spells have been made more potent, except perhaps the blademaster's powerful
WOW WOTLK Classic Gold spinning bladestorm attack, which no longer makes the orc hero completely invulnerable to attack--now it's just spells that don't affect him during that maelstrom of melee strikes.
The beta's newest maps have more high-level neutral monsters to fight, like granite golems and red dragons.
Blizzard is in the final stretch of finishing WOTLK Classic for this summer, and where this shows the most is in the polished little details that have made their way into the latest beta build. The game programmers have added a few new features and refined a few others.
One surprise is that you can now rotate the camera about 45 degrees to either side of the default perspective using the Insert and Delete keys. Blizzard had said that the game would omit camera rotation to avoid making the interface too complicated, but this isn't really free rotation--the camera snaps back to c when you release the rotation key.
The formation system, which automatically directs your melee units to arrange themselves in front of ranged units and spellcasters, has also undergone some revision, as units will no longer try to form up in the middle of combat, and the Alt key can be used to disable the formation system at any time.
There's also a new layer of visual polish to the game, with plenty of
cheap WOTLK Gold new combat effects, including more blood and new details to some buildings, like the night elf trees of life, which now have butterflies flitting around through their branches.