These are pretty new on the market. However, your questions are basic. Nearly all red maples are quite fast on moist sites or where kept watered. Autumn foliage color can be expected to ba as described, although sometimes even clonal cultivars will vary with site conditions. No way to avoid that, unless a particular one is found to be consistently poor in your specific area and you find out ahead of time.

Any large-growing tree will eventually have roots come out of the ground near the trunk if settling and erosion of the soil there is not being corrected enough to make up for the increasing thickness of the roots. Add a little coarse topsoil periodically to keep the roots covered or don't try to have turf or paving right up to the trunk. While it is true that this looks better than having a gap around the trunk it may not be possible to maintain this effect on every site. And newly planted trees should also have a grass free area around them anyway.

Brandywine is my favorite of the Acer rubrum varieties. It colors up to a bright pinkish red here in Texas and early in the season which is better for me too.