Dear Brucect,
“how long will take to put on and off for responsive layout customization?”
>> This feature is available in this template, please look http://prntscr.com/131zsf .
“I dont like to use wide layout why there is no parameters in template back end (why I have go to hack the code then it gets disappears in next template update.)”
>> If you disable responsive layout, the site will run on Normal layout.
“why there is no more font customization (Google fonts from backend parameters for older Joomlart templates) then i have to hack to template files and it will disappear in next update cycle.”
>> You could add fonts to folder templatesja_fubixfonts and import new font into your site by add path in file templatesja_fubixetcassets.xml.
Regards