After seeing the price of the individual upgrade Deluxe edition... my god! It cost more than any of the major DLCs for CK2 or some for the EU4! I am not sure how extensive are those events ingame but I have a feeling this costs about 30% more than it should. Its price is the same as CK2 all Unit pack and more than EU4 unit pack!
17.99€
Once major DLCs come out and this costs more or same price... that will look incredibly greedy and stupid.
Edit:
I own all of the DLCs for CK2 minus one or two music ones, but this is way beyond what I consider sensible (and actually worth buying even on sale). I wonder whether I should expect higher prices on the Imperator major content DLCs now or the unit packs are going to cost about double of what they used to in other games.
Edit2:
Depending on how extensive the added events are the actual price (9€ on sale) will either be borderline worth it or not at all worth it imo. Especially once the usual DLCs are out, with similar (or god forbid lower price!) and you have to compare what you get.