Like PenguinX said, Lilligant's main redeeming factor is Quiver Dance. With sweepers like Sawsbuck/Venusaur the second the weather is changed, they are mainly dead weight. Lilligant can act effectively out of sun, and can still heavily threaten the opponents team. I really can't count the number of times I lost the weather war, but still managed to boost Lilligant and sweep my opponent. Lilligant had pretty much been forgotten when Giga Drain Venusaur came out, but it definitely has its own valuable niche in this metagame.