Hi i will do complete this tasks on magento and update you
1. Change New Theme must be responsive mobile friendly (apply and make sure all functionality everything work fine and take care of speed of site as well and make sure work perfect in mobile as well layout and functionality design etc)
2. Apply Visual Editor extesion (to change the home page design time to time visual designer like wordpress has u can install extension )
3. Slight modification in shipment extension (all information not going to shipment label should go proper information in shipment lable generate after submit )
4. update payment gateway extension the new extension update which payment gateway provide for magneto need to update old extension
5. Retesting whole site all functionality and make sure everything work well and take care of responsiveness issue.
I am a "Magento 2 developer". And fully Expert In Magento 2 Customization, Speed Optimization,
Integration, Upgrade,Design and Developing e-commerce website.
As a Magento 2 Designer/Developer are expert at offering:-
* Custom Magento 2 Theme Design
* Magento 2 Template Design & Redesign
* Magento 2 Template Integration
* Magento 2 Plug-In Integration
* Magento 2 Shopping Cart Design
As a Magento 2 developers have knowledge:-
PHP5, CSS3, HTML5, j query, JavaScript, Ajax, Responsive theme, Custom module development, Custom shipping method, Shopping cart development, Theme design, Magento 2 upgrade, Magento 2 extension development.
Thanks
Krunal