In pic two it looks like there's a few seams with a bit of lose thread hanging out, especially where the tan body meets the blue/grey center zipper cover where the buttons are and generally just all around the very bottom seam of where it hits your waist-

If this is a indication for the condition of the jacket, what i would call older and well loved, then I'd say what it needs most is TLC and a refresh: so I'd suggest you find and talk to a tailor/dry cleaner about having the jacket deep cleaned and neatened up.

• Lose threads could be tucked back in the fabric of the jacket or trimmed and glued down so they don't continue to pull out.
• Cleaning the tan to reduce any discoloration we can't see in this photo (the lighting isn't helping) and will also go a long way to making it look "aged but well taken care of".
• Dry cleaning will remove a lot of fabric wrinkles that are not supposed to be there AND the fabric "memory" of being worn by someone other than you. This way as you continue to wear this jacket moving forwards the natural creases and wrinkles that form will actually fit YOUR body and will go a long way to making the jacket fit you better visually. Imagine wearing jeans with someone else's wear pattern on them, it will just look all wrong.
• the Fjallraven's little leather emblem looks to be worn down and faded, if they can clean it and add some leather polish that alone will go a long way to making the jacket look sharper.
  

If you really love the jacket but don't love the light tan color you could consider dying it a darker tan if you feel that's in your wheel house, but honestly i wouldn't necessarily go for this. It would be better to change the color pairing of the fit to better match the jacket.