User blog comment:Blappp/AoE II Tech Tree revamp/@comment-31031245-20170201204543

Personally, I like your idea, it seems more enjoyable and easy-to-read than the normal tech tree! :)

However, excluding the Imperial Skirmisher (who technically is an upgrade to a generic line), I think it would be redundant to add shared unique units, seeing as they are 100% Unique Unit lines.