I would highly suggest you spend some time refining the combat and skill progression systems, as many characters have absolutely nothing in their skill tree beyond level 20 or so, and many of the current skills are only partially implemented.
While balancing the combat will definitely take a long time, finishing implimenting the existing combat moves should not, and that is far more impactful to the existing gameplay loop than poor grammar or insufficient story content.
Finally, I suggest steepening the exp-level curve for later levels. There is no reason I should have gone from level 13 to 30 in one (admittedly long) mission when it took me around 8 missions to get to level 13. As it is, you practically gain a level each combat scenario which makes the difficulty utterly and comically vanish once you get those core combat skills to synergize.
