For the current default mode, you inherit scientific bonuses on buildings that are already down, but not on any buildings you build later.
Being unable to take over good scientific territory (or offworlds) is unfortunate, for sure. I'm still not entirely sure how I feel about the mode on the whole, though I do like the idea in principle.
More on-topic, I suppose I can understand the utility of being able to locate and take claims that were instrumental in blocking an opponent's territory. Being able to track the claims you have exclusive access to more easily would be helpful without being meaningfully harmful (at least as far as I can imagine), but does ultimately feel like a bit of an edge case to me.