You can create LinkItem.cshtml under Views / Shared / DisplayTemplates and use EPiServer.SpecializedProperties.LinkItem as model.
This would change only display in view mode, but i need to change editor of link item.
LinkitemCollection and LinkItem don't seem to be very extendable. You'd have to define new property types or perhaps solve the problem using built-in properties (content area and blocks?).
I wanna use LinkItemCollection in my block, but i need different properties in LinkItem editor. I'd like to rename "Title" to "Description", and maybe add new properties. How can i implement this? Is there an easy solution?