I had some ideas...(I edited more in)

-Sequencing to groups: What if each group activation button has a timeline so if you press group 1 to activate, instead of activating all the parts at once, you can set what parts will activate in what order.

-Redo detachers: I don't really like the look of detachers. The devs should make detachers smaller so if you place the detacher on a block and put another block on top of it, the block will conceal the detacher to give a clean look. The piece still will seperate from the creation when needed. Also I wish the devs would give detachers the ability to re-attach to the closest piece near it.

-Make new hinges: I would like new hinge rotaters that have no bar connectors so there isn't a small gap between the peice and the motor to make a cleaner fit between pieces.

-Add peice orientation so you can edit piece positions. For example, you can edit a hinge rotater to be bent at any degree within it's range. (Not like the finetuner or overload mod, I don't mean rotating the whole piece)

-Add a bar to indicate how much damage you take from bullets before exploding.

-Make the custom fuselage more customizable. I want to have the ability to curve the fuselage rather than just tweak rise and run. I also want the ability to make the fuselage limits larger than 5 to save the use of several pieces.

-I want a new gun that works like the wing gun with one barrel but it can be placed anywhere on the fusalage.