Actually I have, on both accounts. I created my first game in high school and went on to get a degree in video game design and programming. I know a little bit about the subject at hand.
Being made with modding in mind or not has nothing to do with the game's ability to be modded, just the ease of doing it. Any game can be modded on the deepest level if the source is released. Very few games release their source obviously, and for good reason, but to say an engine doesn't support modding is garbage. There are no engine limitations that prevent another coder from coming in and tweaking the source to create a mod. That's the worst case anyway. Very few games are developed without some sort of resource package system (if the resources aren't just out in the open) and all we need is a way to open those packages to start changing things.
Anyway, I guess the publisher was wrong here huh? Paradox is the one who told us multiple times about some silly engine limitation, all the while Ino-Co (the developer) has tools they are willing to share.