I sincery hope larian will make D2 modder friendly.
Turning a game easy to mod is a gigantic boost in the value-for-money ratio of a game since we can expect to spend €50, but later on have free, easy to get new content that will extend the life of our purchage.
Just look for example on Oblivion. Its a game with a "couple years", but the modding community has kept it very much alive, and still selling copies. For example, i bought the game after seeing on youtube a video of the "qarl texture pack", and it looked awesome, or for example Deadly reflexes mod that change the combat system.
Another example is Gothic3. I would never touch it without the mods due to bugs and lousy reviews on the internet, but after reading comments that some unnoficial comunity patches changed all that, i spent my money on a copy of it also.
DragonAge will be a gigantic seller. They were smart enough to say this game is just the beggining and a lot of new content (oficial and comunity) will come up, virtualy turning your € 50,00 into much much more.
Divinity 2, with a good modding comunity, has GIGANTIC potential to be an terrific value for money and i hope they will embrace the modding comunity for i am sure to be alert on that!