I have a few suggestions, I will only state the general idea as I think creativity should be left up to the devs, here they are. A sort of sky anchor but that attaches to other techs. Water update with boats, lakes, submarines, torpedos, and possibly a whole new faction (I know that one would be extremely difficult to execute). Altitude lock for flyers. A way of re attaching techs after explosive bolts. Thanks for the consideration.