Don’t take the forced DPF regenerations lightly as they add too much stress to the car. Keep driving the car as you normally do and if the oil reaches the limit, replace it. As you did the last service on October, you can replace the oil on March when you are half way through the next service and keep halving the service intervals. It is normal for the oil to rise. You cannot do anything about it no matter how you drive the car will always need some regeneration. The hesitation may be just a normal thing for cars that are not used in proper conditions.