I'd like assignable featured images


Basically your portfolio posts can have say 5 featured images (or the ability to add as many as you need). For a design business all featured image ones could be logo design, featured image 2 could be web design, featured image 3’s could be graphic design etc.
When you create a page for logo design and insert the portfolio element you can set it to use the featured image one for the previews, that wall it will show all the logo’s for the clients that you have probably done more than just the logo design for (many of mine i’ve created the logo, website, publicity etc). This way you don’t have to create a new post for each design you have done for the client.