You can create "Unlimited Sliders" within our theme, so not sure why you're being restricted to 10. However if you want to contact our support, we can certainly assist you with these questions and concerns: https://owmlabs.ticksy.com
As for fullscreen mode, it all depends on the gallery you're using. Not all of these scripts support Fullscreen mode. You can read inside our documentation, as well Themeforest Item Details, which gallery scripts and resources we are using and through those you can see what features are available to each of them.
As for no picture proofing, we never promoted that as part of our product. This is possible in doing, but would require third-party resources such as extending WooCommerce with extensions. Or thinking outside the box, you could create that proofing process manually.
We apologize that you feel our theme is poor, unfortunately we cannot please everyone, but we never promoted picture proofing, or fullscreen mode on photos, outside of the fullscreen background videos, sliders and galleries. These are definitely fullscreen in regards to they do populate the entire browser window (not the monitor).
As for the issue with sliders, we'd be interested in reviewing that as this certainly is not the case in our theme - we promote unlimited galleries and sliders, so I'm uncertain without further review why you'd be meeting a limitation in this use.
- Bryce Wisekal