Having played the Orzov league, I am a little disappointed by the event objectives. They not only felt very similar to the Guilds O’ Ravnica objectives, they didn’t feel very distinct between nodes. If it weren’t for the color requirement, I think I could have played one deck with low cost creatures and lots of spells for all 4 nodes.
I think the objectives should be closer tied to the guilds mechanics. Here are some ideas:
Orzov: Create X Spirits; Gain X amount of life
Simic: Control a creature with power 10 or more; Cast X frogs, lizards, or crabs
Azorius: Cast X Spells with Addendum; Destroy 2 or less creatures
Gruul: Cast X Creatures with haste/riot; Deal 20 or more combat damage in a turn
Rakdos: Cast X creatures or spells with Spectacle; Gain X amount of mana from attacking creatures