What were your gravities again?
OG 1.036
FG ????
I can see a "mild" coming across as bland at first. My first all grain was a mild and I also thought it was bland; that is, until I kegged and carbonated it. Then it came into it's own and got some legs; nothing too big or robust, but definitely picked something up in the aging/carbing. Carbonation alone will add dynamic to a beer. I actually turned into a nice drinker because I could have a couple without feeling much effect from it at all.
I don't know if _I_ would add anything to it. If I did, I might think about a small hazelnut extract addition but you'd really want to keep it SUBTLE. What you DON'T want to do is open a bottle and say to yourself "that smells like hazelnuts" (then you know you'd have added too much). But again, I would probably just bottle and let carb. It should get better with age and carbonation.