Please allow my notes and references to help with your exploration of Gothic churches and architecture:
First of all, as you list unique features to this type of architecture, you might note that they were quite influenced by the late Romanesque architecture of Normandy (http://www.xs4all.nl/~helfrich/gothic/architecture.html). Common traits of Gothic also include these elements such as airy and bright, a focus on verticality, pointed arches, rib vaults, flying buttresses, large stained glass windows, ornaments and pinnacles, and other traits (http://www.xs4all.nl/~helfrich/gothic/architecture.html). This style is quite elaborate and decorative. Some common decorative elements also include tracery, gargoyles, etc (http://www.cmhpf.org/kids/Guideboox/GothicArchitecture.html).
Again, key characteristics are common to this particular type of church. It is evident that they contain pointed arches and vaults in windows or doors. However, you might also look at their structural innovations to offer more stability. Research focuses on how they used "steeply pitched gables, and balanced thrusts in stone masonry. Stone sinews are visible" (http://www.cmhpf.org/kids/Guideboox/GothicArchitecture.html)...
In other words, you might infer that these new ...
Gothic church architectural examples are noted.