Shopify Site need Improvements

We are looking into a number of tasks on an outdoor e-shop - https://ottegear.com. This e-shop has been launched recently and is using Masonry theme with Coyote layout – [login to view URL] It uses Shopify Payments as well as PayPal as payment gateways and Shopify Shipping as a shipping provider. There are also a few apps running on the site: • Bulk Discount Code Generator • Connex for QuickBooks • Easy Redirects - Bulk 301 Redirects • Form Builder • Mailchimp for Shopify • Now Back in Stock - Email & SMS Out of Stock Alerts The most important one is Connex for QuickBooks as it has Shopify connected to QuickBooks Desktop for overall accounting purposes such as orders and stock levels. Due to overlap on some of the requests with existing functionality we do expect reusability of some plugins where possible with some custom coding. At the same time, for small requests, we would expect direct edits of Liquid files rather than using another app in order to get a right balance and compatibility overall. Also, if there is a room for improvement, any suggestions are welcomed at this point. Please let me know if you have any questions on these. Thanks a lot.