Hi 

I put it on our development road map. Unfortunately in March all our development slots are filled, so this enhancement will be available on production in the second week of April. 

It seems useful and interesting. We have to think how to this from UX perspective.

I keep this issue opened to allow other users to comment.

It is hard to imagine that you can set reasonable default values for data type/length/null of column for the whole model where you usually have hundreds or thousands columns with different types/length etc. So we don't plan to implement such feature.

Regarding column name patter it duplicates the following issue:
http://support.vertabelo.com/topic/565476-pattern-for-naming-objects/
You can vote up.

Ad. 1 It is on the way. We plan it to have on production in February.
Ad. 2 Interesting improvement. We will add it do our roadmap of UI/UX enhancement.
Ad. 3 To be considered. The little problem is that it can conflict with popping up column type selector (Enter key). We will analyze it.