I also don't understand the complaints about sniping systems. Nobody is entitled to any system. Its a first come, first served system.
If you are daisy chaining, you are the person in the best position to know when your system will be finished and get there to claim the next, but yes, someone could come and finish your system while you're offline and then claim the one you are aiming for. Well, that's your choice.
FD could resolve this easily, and remove the need for people to spam single outpost systems, by removing the limit and let people just build where they want to.
At that point, a system i want to colonize would immediately become available. It is theoretically possible, someone would grab it before me, and of course, i'll be a tad sad about that, but there are so many systems, ultimately, i'll find one even better.