@RakeAnomander Mantis lost its bot icon shape for the tank icon shape a while back, but aside from that I don't think there are many such things because most types of units ("what they are") correctly corresponds to what it's good against. UEF destroyer is just an outlier because it has really weak torpedoes due to the existence of the cooper. In theory it can be confusing but people never faction mix coopers + other faction destros.

An icon change we can draw parallels to was Brick/Percy getting the "x" symbol instead of the directfire "+" symbol to differentiate from Loyalist/Titan (12 years ago). Nobody would disagree with this change, and having separate cooper/valiant icons is a similar case.