I don't agree with this it makes sense narratively, when the dev is the one who wrote it that way. The dev could of easily written her in a better way and gave more content to her.(Not sex, just relationship progression)
Let's be real 99% of people only play these games cause of romance and sex. The Stories are good, but you can get stories anywhere, romance is why we play these games.
So when a LI is treated like less and will really only get a very small amount of content, and a ending, that just feels bad. Just make her a side girl in that case. The dev has just completely and utterly dropped the ball on Medb in my opinion.