Magento 2 Customer Discount allows you to offer tier pricing for certain products and help you leverage the possibility of sales.  

Yes, Magento 2 Customer Discount allows you to set a particular price for multiple products.  

Yes, with Magento 2 Customer Discount Extension, Admin can apply promotion rules with/without coupon code.  

The most common pricing strategies are: Cost-plus pricing, Market-based pricing, Consumer-based pricing, Dynamic pricing, Differentiation pricing  

With this module, the admin can create rules using order attributes as well as Customer attributes.  

With Magento 2 Promotion extension installed on the store, customers can apply/edit/cancel discounts from a cart as well as the checkout page.  

Yes, you totally can do. You can set the default duration for a membership level from Manage Membership section. In case a membership level has different durations, go to the Product > select Membership package > set duration as Custom > add different durations.

Yes. From the admin backend, at the History section, admins can view all the membership updates including Buy New, Upgrade, Re-new

Not at all. The membership packages are built based on customer groups or product the store admins create. And there is not any restriction to the number of customer groups.

Yes. this extension supports all types of languages so you can easily translate it into your wished languages.