It's my understanding that you are either in ketosis, or you are not in ketosis. If you're shooting for a ketoginic diet, fats have to be high since they're your energy source. Di Pasquale's "Anabolic Diet" recommends a ratio of 60f-35p-5c through the week, with a 36-48 hour carb up on the weekend. I haven't tried it myself.
If you're not burning fats for fuel, then reducing carbs is just insulin control IMHO, which you're doing fairly effectively already with low GI choices Santa. The worst approach would be to hover at the edge of ketosis with a daily carb intake high enough to keep you out, but low enough to make you foggy and tired. If you're going to go low carb, then go all the way and suffer through the changeover, but I wouldn't choose the semi-low carb, or "reduced carb" approach myself.
Honestly, I don't see anything wrong with your current approach (in the original post). If you're eating a more-or-less Zone Diet 40c-30p-30f (incl. EFAs), just address your total calories. Reduce them gradually (reassess as metabolism adjusts) and increase interval cardio. If you border on overtraining as a bulker, accept that you're going to have to reduce the workload in the gym when in calorie debt, perhaps consolodate your split to allow more days without weights. If you're natural, don't do anything extreme.
My $.02.