A) Don't miss! Just take a squid out in practice mode and practice all those sweet parkour jumps. It took me a while, but now I only ever miss sometimes if I'm playing music and have to hold down my x/z key the entire match like some sort of six fingered mad man
B) The squid is a tiny piece of metal, traveling at breakneck speeds. Frankly, there should be more railings! (I'm not actually suggesting this, just the squid is horrifying when you think about it) Removing that inner railing would sort of ruin some of the personality of the ship, and it's totally possible to get that jump down consistently.
What I WOULD be in favor of, in terms of a squid redesign would be lowering the top engines to make them easier to hit from the bottom. I feel like something happened a few updates ago that messed with something, and the top engines have been a lot harder to get from the bottom, to a point where it's barely a reliable move. I've adjusted my whole chem spray cycle to adjust for it.