I am very glad that you decided to modify the existing plugins. I have a huge number of notes that I wanted to offer in a slightly different way, but so be it.
-=Mobile menu=-
No option to replace mobile menu icon
No ability to change hover when hovering over mobile menu icon
and in general, there are few settings, you can not choose the width of the pull-out menu on mobile, add a shadow, frame, rounding, etc. standard what is possible in all plugins, even the size of this icon
-=Images=-
It is impossible for the photo to be on the PC, the laptop - absolute, and on the mobile by default
The ability to make the Width of images not only in px but also %
-=Icons=-
There is not enough choice of svg icons in plugins where you can add font icons.
It lacks the ability to put your own icons or svg images in navigation, lunge lists, etc.
-=Tabs plugin=-
Very few styling tweaks(no hovers, no borders, no icon change, etc) and bad behavior on mobile - this plugin always has to be edited via custom code
-=Head plugin=-
You can't do line wrapping, which is why I never use it.
-=Content Slider=-
There are few settings for such a complex plugin and the height of the plugin fixed in px is very disturbing
-=Other=-
It lacks the ability to indent between columns for a tablet-mobile, on a PC you can’t choose what value this is, only on/off. + lacks not only fixed grid blocks 1-12, but also custom columns with 1-99 percents
It's too bad that you can't properly manage the styles of the buttons "load more", "add" for portfolios and testimonials, etc.
If there are several lightboxes, so that they are at least numbered. Or give them names in the admin panel.
There is not enough margin left-right for plugins, now it is only in height and you often add to the editor
Microdata(schema.org) for FAQ (as an option)
Animations of slide sets do not work, always only fade
Bug in custom html plugin. css tab, if a lot of code (more than 50 lines + -) scroll starts to glitch - this bug is already a couple of years old))