Seamlessly picking up another writer's style is difficult. You could find a writer talented enough to do so and even improve on the story with greater writing skill than Eva can offer, but so-long profits, expenses and any other cash she needs to keep the ball rolling. Not to mention the time it would take to locate the right writer or the fact that it wouldn't be her story anymore. What creator would want to do that even if it was feasible?
Line-work? Yes. Eva could pick the general photos for tracing, give directions on mood and theme and let them roll. Programming? Yes. She's already got someone, apparently. Great if she could pay them to do all the coding or outsource another part-timer.
Help with more monotonous daily management, PR, updates, exploring release opportunities? Maybe. If she finds someone sharp (yet stupid enough) to work on the cheap, or a potential skilled super-fan with a lot of time on their hands.
All three? Probably not until she has a lot more cash rolling in.
Other than someone organizing and documenting the lore for her and finding conflicts within, writing help is just impractical. She does need to delegate other duties more and get comfortable with handing over the reigns on some tasks. I doubt she wants 5 more years of development time any more than we do.