The people I worked with have been great. I have no complaints about anyone I've met along the process. Whatever you are doing to promote good customer service is working.
I have provided a back door with blinds built into the glass. The side patio doesn't need three access points from the house; perhaps delete one or two so you can put a table against the wall. The garage allows excessive heat into the loft above; the garage should be better insulated or the floor of the loft should have better insulation.