its very good news you decide to start create a new news theme. i hope it release as soon as possible. i have few suggestion for that:
- please dont define extra styles for k2 or easyblog or something like them (i think there is not need to integration with stores or social component as you know a news site dont need to them Not at all). at this time joomla article is full option and with new features in joomla 4 media manager it will better. i think almost of users use joomla article base features. so please dont heavy your codes and styles with unusable cases. (whatever there is a better choise for news sites like Komento which a news site almost need it)
- please use all standard meta tags like schema , Open Graph and twitter metatags on all section and pages.
- please decrease http requests
- please remove extra css/java as possible (a news website need be clean and fast not luxurious)
- please combine css/java files as possible.
- please add RTL layout for all section and addones. there is many users with RTL languages which need your great themes.
- im persian and i use special font on my site (RTL) . so there is no need to force load fonts like google fonts or maybe Awesome Font. please let your client to disable them fully
- plese add swg logo format
- please Eliminate render-blocking resources
- please focus on optimize your AMP version as you know its very important for a news sites
- lazy load for all section of your template is very Vital
- few modules in your themes scale images which not good for seo
- persian users use Solar Hijri format for dates. so if you customize it for Date Elements, help many of your users.
- for video element: youtube and viemo are censored in iran. iranian almost use aparat.com. so if you can please add that to your source list.
and at the end SEO for NEWS/Magazine site are vital. so please be sure your new template be full score according Google PageSpeed Insights.
Sorry if it took so long, but I believe your products deserve the best quality.
at the end, im Persian translator of many joomla projects as you can see my profile in transifex:
as a offer, if you want i can translate your products like your templates or extensions to persian language.