As most pages in a site use a template, it makes sense to be able to setup you own templates where each template consists of:
So when I instantiate a new page I get to chose from one of the templates. So that I have good starting point. Would speed the workflow a lot.
Custom Templates – my previous reply from another topic of yours:
Custom Templates, gotcha 
Don’t want to share too much information, but custom Templates seem to us as a logical step-up and we’re thinking for some time about this.
No any ETA’s, but hope to see it one day 
There are obvious differences in your both template requests, but considering our vision of possible updates in this matter it’s the one thing.