At the end of the day, Juliette not ending up with Nick isn't a big deal. Nick is constantly called a doofus so I don't see why anyone would think she drew the short stick.
In the final two seasons, Juliette has gotten more screentime, has been more essential to the plot, and is more powerful than Adalind. She was the only other character to go into the mirror world and the ultimate plot of the season pretty much revolved around her. I think Juliette even received more screentime with Nick and got an emotional death scene all to herself.
Juliette doesn't want the life Adalind has nor does she have any time for Nick's guilt so she came out just fine in the end and can choose any life she wishes to have. She has more power and abilities than most have so that shouldn't be too hard.
In the final two seasons, Juliette has gotten more screentime, has been more essential to the plot, and is more powerful than Adalind. She was the only other character to go into the mirror world and the ultimate plot of the season pretty much revolved around her. I think Juliette even received more screentime with Nick and got an emotional death scene all to herself.
Juliette doesn't want the life Adalind has nor does she have any time for Nick's guilt so she came out just fine in the end and can choose any life she wishes to have. She has more power and abilities than most have so that shouldn't be too hard.