Smarty

I changed compile_dir permissions to 777 and works.
for security we can change the name of the dir to the fancy one like smartycompile9a6dbdy

cheers

Output filter works.
When caching is on
and compile_check also.
I modified GZipPlugin
-commented:
//!$smarty->caching && //~ caching is disabled

and added sending headers:
$maxAge= ...

Symfony is good solution - search Admin Generator, but without a checked code (somebody's - not only from documentation) you are far away (much time to have working code). You can use it only for back ...