It sounds like you are well fat adapted now. If you have had good luck with the keto diet for weight loss in the past then you can probably do it again now. Much of your training has been and will be in the low aerobic zones which will be fueled mainly by fat. You can try the weighted uphill ME workouts on this low/no carb diet and see how it impacts your recovery. I don’t think our training plans demand an increase in carbs. But just monitor your recovery and adjust by increasing carbs a bit if you feel like the revery is not fast enough.