Did I pay attention?
Yes, very good, 9/10. Now connect pin4 to Gnd also (In+ must be high AND In= low for the driver to switch on the mosfet).
UCC27533 spec shows 1uF decoupling cap, your schematic has 0.1uF.
Ah, me too. I've put 100nF on my application too, but I'm okay with it for reasons which (I hope) will become clear.
The specs all refer to driving 1800pF load - the MOSFET you listed originally is 10X that, 18450pF.
Really? Not 14850pf? Anyway, the parameter which determines switching loss is gate-source charge, rather than input capacitance.
That will translate directly into slower rise & fall times and greater heating.
Hmm, well without any series gate resistance I'd partly agree. But the rise/fall time is going to be limited by the series gate resistance (that's its purpose) not the drive capabilities of the driver. This part will drive a couple of amps into the gate, given the chance, so with a 10 ohm series resistor and a 12V supply, you won't get anything like that, whatever the gate capacitance.
The reason for limiting the switching speed is that as the fet turns on, and the drain voltage falls, gate-drain capacitance can couple high dV/dt rates back into the gate causing oscillation, often seen as multiple switching edges on the drain if you look for them. The switching loss caused by multiple transitions can be far worse than the increased switching loss due to slightly extending the transition, (not to mention the EMC implications). There is a balance to be struck, and when you have the first board up and running, the gate resistor value can be fine-tuned by trial and error. There are several effects superimposed (by increasing the resistance, dV/dt reduction decreases oscillation, lower driver coupling increases freedom to oscillate, and increased resistance damps oscillation), so it's not something that is straightforward to calculate up front.
If two engineers with plenty of experience, but perhaps in different areas, disagree, then it's time to get this circuit onto copper and see where the smoke comes out. 