Some feedback, as requested in OP, in no particular order:
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And the big one - new probing and scanning.
It's noticeably easier and faster than old mechanic; that's good for players who are just starting with exploration, bad for veterans who spent effort and skillpoints on mastering the old one, as it may feel now as wasted effort. Personally I find it more fun now than it was before and more immersive.

One thing that I think needs more attention is balancing number of signatures in system to time spent probing them. In old mechanics probing took from 2 to as much as 10 minutes per signature (depending on skills), so having 4-6 in system at one time was fine. Right now it takes 1-2 minutes, but signature number seems to be the same or only slightly increased. This means previously there was a chance of meeting maybe 1-2 other pilots inside one you probed, right now it seems closer to 3-4 other.
So probing changed from methodical, slow search and exploration of found sites into rush race of who can get to the can first.
I can see two possible solutions to that: either increase the number of places available in system at the same time; or make it so that once you warp into probed site it becomes harder for others to find it (like mission pocket, or even dissappears completety).

And for people who want filtering and ignoring results: it's already there. Right-click on signature and you have option to ignore it; and there's options button on scan menu that allows you to create filters to displayed signatures. The sam way it's been before for at least 2 years.