The square that is resting on the column is interruptive and should be removed so that the slant in the ceiling continues. This is an important line in the space and this square should not be there.

This looks like a nice marble column, so try to save it for a future use, or donate/sell it to a reuse center. Replace it with an appropriately sized support that mirrors all of the other ends of walls in the space. For example, a 6" x 6" that is sheet rocked. Keep it simple - it is what it is. You could combine 2 of these replacement supports, making it twice as wide as it is thick, to change it up a little bit - running the 12" side parallel with the wall.

There are lots of ways to jazz this area up, but for the clean and simple look you seem to be going after, keep this utilitarian spec simple.

Yep, take the upper soffit out - and put in a simple square (raw timber, sandblasted so it looks reclaimed would be best here - the doric column is way off for your dana point beach vibe) Horizontal across with a fork truss above back to the ceiling would be ideal.

Sandy, it is a fiberglass column sandwiched over the wooden support. The beam at the top of the pentagon supported by the pillar also has to have support and I'm told it would cost a fortune to remove it. That's why I though going with a beam across the room supported by square/rectangular post instead of the pillar might help. What about a box at the bottom 36" or so of the column if the top were dry walled?

It won't cost a fortune to remove it, it just needs to be replaced with structural support - which is what is inside - don't remove "it" remove the drywall around it and see what structure is inside . . it should be a sort of upside down truss. . . like this http://www.prowoodmarket.com/products/gable-bracket-42.html

the pentagon is just drywall covering the structure . .. figure out what the structure is, then replace it with structure that makes a big cross plus angles . . . all exposed timbers - that have been sandblasted first . . and exterior steel strapping with raw iron bolt heads . . orb them before they go in or buy them that way . .

I was thinking there might be a center vertical beam in the pentagon and that I could cut out 2 open spaces on either side of it and leave the center intact but still drywalled. the site you sent is a bit too rustic for my use but really great otherwise. What about the cross beam to the opposing wall?

Consult with a structural engineer before removing anything, however the pillar itself can be wrapped with wood & dry walled to make it into a square shape if this is what is disturbing you. Do not remove it without a consult with an engineer.

Libradesign, thanks for the ideas , would the square shape with the "fork truss" be open with just wood or drywalled wood where it alread exists?

The bearing is from the offset of the beams, (having a stick built roof causes these load bearing issues). As far as the shape, it looks like they are trying to mimic the area above the front door. Not knowing your skill level I would suggest to consult with a reputable builder as there are numerous ways to correct this too be appealing and tasteful. Also ensure there is structural designs and an engineering stamp to accompany any bids/work. Good luck

My vision is open with just wood . . you might prefer drywall wrap but I like the character the beam adds. Here is a rough sketch of two options - 1st is structurally enough, 2nd might be visually better for you . .

It will depend on the type of material used! As some have no value consult with a engineer and ensure stamped with his seal and all permits are pulled etc etc...