Here about the new sticks:
G59 Guardian Stick: Non-Imp Stick. You can make it Imperial, but the stats wont change. It has Imperial-Stats.
G59 Guardian Stick with a Blue Gem: Non-Imp Stick. You can make it Imperial, but the stats wont change. It has Imperial-Stats.
(They are like Ancient G59 2h Swords -> Non-Imp but Imp Stats)
G62 Guardian Stick of Light: It IS a imp Stick, just not Imperial named yet, will follow with next Update. So: has Imperial Stats, Making Imp does NOT work!
G62 Guardian Stick with a Lotus Flower: G62 Healer Stick. Imperial does NOT work!
New G59 Dropped nearly everywhere where G59 Drops. New G62 Dropped at Light Lord.