There are a ton of factors that might result in the difference. Stage planning could be a big part of it, particularly stage planning to your strengths.
How to get better? Suck less.
Getting your shooting skills, and the non-shooting gun handling better would be a good start (remember you spend more time doing that than shooting in many stages). 2.3 seconds is a long draw time, from USPSA gear it should really be closer to 1.5 seconds or less for an open target within 10 yards. IMO you should also be able to make 25 yard lower A zone hits on demand at a minimum, and preferable be able to make head shots on demand at those distances.
As far as stage planning, I am always looking at reload points, how to do as many of those on the move while still having shots in the magazine for make ups. But also know when making up shots aren't worth the time (typically when it will force a reload).