It is annoying when you select a group of engineers of various tech levels and only have the option to build structures of the lowest tech engineer in the group. In practice, you have to very carefully select the t2 or t3 engineer you want, queue your build orders and then assist the other engineers to that engineer.
Could we make it so that if you select a mixed-tech level group of engineers, that the highest tech level is available to build, and the lower tech engineers receive an assist order to a higher tech engineer? It would save some very annoying extra micro.