A church with an organ area in that spot would tend to be longer... Also, I don't really like the symmetry... But taht is just my opinion...
Also, the crucifix clashes heavily with the art style it is surrounded by...
The pillars, I noticed, are right in front of the benches that serve as pews... Since this is a church, there would be very little obstructing the view from the pews of the altar.
Hrm... I think that you should double the capacity of the church (that is, add another set of rows) and increase the size of the map by 5... I think if you made a custom Altar by using the top of the grey marble walls (in the same area as the vine walls, earth walls, and flesh walls) and copy a bit of the grey marble side (about half the height) in your TileE (I did this on mine, and it looked nice, but you need both the left and right to make it look right...
Then, you can use that custom Altar in front of your preacher, rather than having a table behind them (it looks really nice with a coupla candles and a hymnal)
As a final note, the switch on the wall is too low... You are using XP, so it should be 1 square off the ground, or else it looks funny...
However, I'm loving the stained glass... I never had XP, so I don't know... Is that standard?