Tear is already the most overrated card in GC. Spoiler: noone will use it. I never felt the need to evolve my Pokes faster anyway, only in T2 Banette (which had Shuppet CG doing that) and Bellawesome (which now has Torterra SF, searching AND evolving them.) Why? Because they still need the energy, often more than 1. So yes, very useless, and no, it won't replace Candy.
The best card imo is the whole G package since you can play a bit of everything and have a different battle every time. You just have so many decks in one, it's not even funny anymore.
Meh, I'll list the cards I like best anyway. Cyrus's Scheme, Team Galactic's Base, Energy Gain.
Side note: I just realised how much of a hassle it's going to be to write the Team Galactic's Inventions on my deck lists for tournaments. And I thought Pokedex handy910 was bad...