Hi domster! Welcome to the forum, and congrats to your Avalon. It's a great brand, and I am sure your guitar will grow on you. Believe me, they do...
Of course it can vary from each individual guitar, but I guess the L10, with it's mahogny back and cedar top, tends to be a bit lighter on the bass than a spruce and rosewood combo, which tends to be a bit boomier or bassier, so to speak. Perhaps it can take some time to get used to, as you and the other guys already have mentioned.
However, the nut and saddle are already made of bone on an Avalon Legacy such as the L10, and the bridge pins are made of ebony, not plastic, so you shouldn't need to change either of them.
What you could do, apart from changing the strings (D'addario EXP 16 or EJ16, Elixir or Newtone all sound very good on my Avalons), is have the guitar properly set up, if you haven't already done that. The action of the strings, the distance from the strings to the fingerboard that is, can actually make a big difference to the sound, as you probably already know. Higher action often improves the sound, at least to a certain degree... Anyway, since it is a used guitar, and it probably have been exposed to some sort of winter climate during the transport to you, it wouldn't hurt to let a luthier have a quick look on the set up.
Oh, and a humidifier wouldn't hurt either...
Best of luck!