Maybe some landscape lighting from Kichler Lighting to highlight the tree as well as the bushes. (Lighting Expo)

Medium gray tones are always the 'safe' neutral route for colors.

Trees rimmed with circular borders always look unnatural. Perhaps removing the stones and boxy hedges would update the look. I suggest creating an irregular mulched garden from the walkway and around the tree, with beautiful annual and perennial plantings. Something like the photo, but less formal and more colorful.

I would cut down that tree since it hides the house and it has more than one trunk. Must not have been trimmed from the beginning. Start over with a shorter ornamental tree.

Also I agree with removing the shutters all together and installing a wider entry door. The narrow door mimics the windows too much.

Consider extending the hedge in a serpentine curve in front of the windows to connect visually around the tree. Plant a row of bulbs in front. Add hydrangeas in gap between boxwood and windows.

We really love the look of stone with Hardie Board siding. The combination is really beautiful. If you custom color your stone to blend with the interlocking driveway, you can end up with a really beautiful space. What color are the pavers? You can pull a complimenting color.

I agree that the shutters should be removed as well as the birch which blocks the entry. A gray tone on the siding as Dytecture suggested will look fresh and then the white trim around the windows will stand out. Also, you could then paint the front door (and the side-lights) white for more of an impact.