I hear that but for me VS Really Solid Players regardless of my match up knowledge. My worst habit is I rush and I have to tell myself to Slow Down. It's actually really hard to control my pace as I tend to be fast but something I'm always working on. Especially when offline players keep telling me to slow down and be patient. I'm determined to overcome this.
My composure VS people at my level or lower is fine but when the player is 100% on point with defense and offense and or aggressive as fuck I rush my inputs insanely to get a hit in or to avoid being hit and one shotted by massive combos or vortexs.
I'd say my number one focus now is having better composure with better players so I can eventually level up. Oh and better fundamentals which have improved but still need to anti air and whiff punish better without the clone.
Oh and with a Blocked B12 I also do Ice Ball every now and then but I find like Tanno does just a D4 is Best after a Blocked B12 to create some space IF they're not blocking low. If not you can risk a clone or burst but even burst can be punished by some characters.
It takes time to get used to option selects but when you get punished enough from a blocked B12 Ice Ball it eventually sinks in