6b, aside from being a good ranged poke, is also an awesome blockstring/combo filler. Gives you time and flexibilty to go into a lot of things. Easy to hit confirm into 5d > 3c, from then you can continue your combo depending on the situation. On block, you can push them away with a lobelia, gattling into 5d > 3c (this leaves you at +0 for mixups) or jump cancel it for pressure OR defense. Very versatile.
On CH it blows the opponent away. Usually people summon pumpkin and George after that happens, but you can combo off it with a winded jump if you have really good reaction.