Its seems The Developers would like a little more time on the game to fine tune it, don’t blame them myself, they will be making alteration to the game otherwise not possible if launched at the original date.
Here are some changes you can expect to see for launch:
- Quality of life user interface improvements
- Balancing work on the campaign/battle AI
- General battle improvements including collision damage, maximum drag-out widths, collision radii and more
- Added polish to various aspects of the game
So the new release date is May 3rd 2018. More info can be found here