Hello Brent,
I think you’re looking for the Model/Platform SDK.
This allows you to do your modelling with code, which could be quite fast for adding attributes.
Hope this helps.
One other possibilit which is not per se quicker nor easier is the use of sdk to define entities and attributes and associations.
Another Idea which (i proposed similar in the idea part) is to read from a json or and create automatically
Once you have an Entity opened and clicked in the attribute area, you can use the following keyboard sequence:
This is how I usually do it.
If most/all of the attributes have the same type, you could also download one of the many Macro Recorder tools and save that sequence. Maybe try some scriptable tool to prepare a Macro script which includes all of the Names/Types (I reckon AutoHotKey could do the job).