I'm thinking about removing that building in the lower left out to make it more symmetrical.
Symmetry is kind of hard, and really only works occasionally. By rubbing out a part of your image, you might make a more symmetrical composition, but someone might argue that "you didn't really take that picture" because it was photoshopped into existence.
I like the sun flare, the little lens flare, and the clouds reflected in the glass. You had ideal sky conditions for this.
The reality of buildings in general, is that no matter how "symmetrical" you think it should be, you may find that it can't actually be made perfectly the same on two sides. Notice there is an extra line going up the left side, and the two sides are not the same length.
BTW: the most artistic examples of symmetry usually have something that breaks the sameness and "surprises us".
Personally, I wouldn't worry too much about the building on the left.