Hey there Mezmerro !
For your 4 statements, these are not really bugs but un-used features, because the mod is still in developpement.
I agree that the fact you have to replace a landing pad to receive the titatium ore is pretty annoying, but a landing pad can store multiple rockets launches. If you have sent 2 rockets to the space with the asteroid mining drill, you will receive the accurate amount of titanium ore when placing a new landing pad !
And for the annoying pop-up when launching a rocket without a satelite, excract your save of your map, go to the control.lua file and remove this line :
game.show_message_dialog{text = {"gui-rocket-silo.rocket-launched-without-satellite"}}
Which is, in my save located at the 43th line. After this you have to be careful which save you are loading, and maybe reiterate this processus each time !
Hope it will help ! :)