I don't "see" the problem ... evil
You can buy the full Dragon Knight Saga (Ego Draconis + Flames of Vengeance) at a cost of 40 €.
Only the add-on, FoV give you around 30 hours extra gameplay ! It's a "game" on his own wink .

Plus :
you can choose to play first Ego Draconis (remastered!)
or
you can immediately start from the beginning of Flames of Vengeance with a Level 35 hero wink So NO saves from Ego Draconis needed to begin playing Flames of Vengeance on your Xbox360 ! wink
Naturally you can play Ego Draconis over again and play further on, seemless (!) in Flames of Vengeance, taking weapons, gear etc from Ego Draconis with you ... .

On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin,
it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !