Live support should be added, including food, to make probes more useful. I know ksp isn't a realistic game, but still this would make probes needed to collect sience for later manned missions. And I think that a manned space station around kerbal, or anywhere else in space, should collect sience, not much something like 10 per year, but that space station needs food, and so you got to refil it with other rockets, wich offcourse could be probes. Sorry for the bad English, I have exams this week, but still wanted to let you guys hear my opinion.