Need a starter set- depends. I personally only needed the damage deck and various general upgrade cards/tokens from the starter set (got the Scum and Imperial conversion kits, and had acrylic templates ordered).
The business end of the game probably dictated the choice to do a new starter set and conversion kits only, rather than adding in some sort of 2.0 battle-box style set. This is a business out to make money after all, and having to purchase a starter set in addition to conversion sets makes more business-sense for FFG/Asmodee. If they had placed templates, more tokens, all the generic upgrade cards, and damage decks from the starter set in the conversion sets (as a battlebox) you would probably be looking at another $20 easy- and then we would get complaints from those who had to purchase multiple conversion kits about the price being too high because of the duplicate items just mentioned. So I can see how not adding in those components and just keeping them in a starter set that they would have had to produce anyway, due to new players, was simply the easiest way of doing things for FFG because they would most likely get the same amount of griping anyway.
Edited by Ikka