You are stating your opinions as facts which isn't very helpful. I don't think anyone but paradox can definitively state what their strategy is. The rest of us have to use words like "think" and "suppose" and "suspect" 
The fact that you can't direct the AI by setting goals in Vanilla isn't a big deal in my opinion. I have the DLC but never set any goals and manage to play just fine. Forts are an excellent way to keep the AI from steamrolling my territory, I don't think this is just useful in MP.
The only valid point you might have, in my opinion, is "you cant build more buildings If you dont spent some points on developement. How do you spent some point on developement you ask?"
If this is true, that you are locked out of building more than 2 (I think is the starting value for most territories) buildings and have no way to improve the development value of a province is likely an oversight by the development studio. You end up stuck at 15th century development values. Though I can't rightly say there's an easy way to solve this problem. If you allow vanilla to build 'all buildings everywhere' you end up making the DLC a nerf. Perhaps the development improvements should have been part of the vanilla build. I would recommend making a separate thread for this and explain the situation without bitterness, and possibly the developers could formulate a response to this. And if it has been an oversight, perhaps even fix in one of those dratted free updates.
Right now that issue is hidden in a big tinfoil wrapper and I don't think that is helping it getting fixed.
The fact that you can't direct the AI by setting goals in Vanilla isn't a big deal in my opinion. I have the DLC but never set any goals and manage to play just fine. Forts are an excellent way to keep the AI from steamrolling my territory, I don't think this is just useful in MP.
The only valid point you might have, in my opinion, is "you cant build more buildings If you dont spent some points on developement. How do you spent some point on developement you ask?"
If this is true, that you are locked out of building more than 2 (I think is the starting value for most territories) buildings and have no way to improve the development value of a province is likely an oversight by the development studio. You end up stuck at 15th century development values. Though I can't rightly say there's an easy way to solve this problem. If you allow vanilla to build 'all buildings everywhere' you end up making the DLC a nerf. Perhaps the development improvements should have been part of the vanilla build. I would recommend making a separate thread for this and explain the situation without bitterness, and possibly the developers could formulate a response to this. And if it has been an oversight, perhaps even fix in one of those dratted free updates.
Right now that issue is hidden in a big tinfoil wrapper and I don't think that is helping it getting fixed.