1) Existe algum tipo de modelo de motor disponíveis?
Brook generates forms from database tables. However the HTML entered manually is very little, the site Brook was done in 19 hours in Notepad++.
2) Is there a provision to use something more efficient than CGI -- FastCGI or, even better, built-in web server?
Currently if you need high performance can use FastCGI.
I tried to maintain compatibility with Apache module, but at the time I had no time to do this. but nothing prevents you from creating a layer to support other types of servers.

With FastGGI I managed to make 2900 requests per second. I used the HP tool for test it.
In short, you can use Brook yes Ask!