I understand the issues presented, I was unaware the jetpacks were already previously in use.
To address the issues brought up, I can say that the Jetpacks are actually better for server lag than the current 104th jumpacks whilst also being easier to use in a server whilst lagging, since the jumpacks will sometimes just straight up not give you any vertical acceleration if the server lags enough. Alongside the improved server and some fiddling with the code to make it so the Jetpack doesn't spawn an entity and drop upon death I feel like the previous bumps can be ironed out upon a revival of this addon
And one way to balance the issue out for ECs is to include more mandalorian ECs or a type of jetdroid for droid attacks, basically give a couple ECs a jetpack to even out the air superiority.