I agree with Keith, freeing up scout cap is valuable and shouldn't be too easy.
As a side note, would upping Scout I and Scout II speeds to match Mark III be considered? It is so annoying to scout with a mixed group because they disperse that I find it basically pointless unless I heavily micro them. If I group move them, they all slow down to Scout I speed which is a net decrease in survivability, especially when one stupid Scout I survives, slowing down all the remaining Mark IIs and IIIs.