As you rightly say, it's hard to see if it will become a problem, or not.
As stated earlier you do have an excellent warranty period left, but, if you feel uneasy bout things then you already know the answer yourself.
My car is a 1.6 petrol EDITION... I don't recall feeling vibration in the gear stick however, I only only touch the gear stick to actually change gear WHAT I MEAN IS, I usually rest my free hand on the hand brake or the prominence of the passenger seat when not holding the wheel with it.
Good luck in your decision making.
Someone else may have better information for you.