Edit: I got ninja'd by ChaosCloud!
Technically I ninja'd the whole thread before it's existance

(but I might have been ninja'd before that too so whatever)
The wish for an exploration filter is almost as old as honk and jump. I know that I've mentioned the wish for something like that myself a longer while ago.
With 2.2 we'll atleast get a step towards there, or half a step. Currently it tracks what systems you've been in, but extremely badly. It actually doesn't even track which systems you've been to, it ONLY (as of 2.2 b7) tracks the systems you've JUMPED into.
For example, I was somewhere in deep space from live and wanted to test whenever a crew member can fly my ASPX while I SRV around (nope they cannot, BOOO) so I've used the self destruct for the first time ever and landed in Garoku.
And guess what, the system was not visited

not even after changing planets and leaving the station I got respawned in.
I really really hope they will do a migration of your past travelling data when 2.2 goes live, otherwise will that filter be a bit of a let down.
Alone because you can technically already see which systems you've been to, these got a system map. You just can't see that in any easy way at all.
But yes I definitely hope they build up on that filter so we can find our own discoveries easier, and systems which have something left to scan.
I also had a different thought about the honk and jump and the surface map a bit ago.
Does it really make such a big difference if we'd get the surface map from just honking?
The argument from the "true" explorers is that it makes things too easy.
That is partially true. However, these people do exploration for it's own sake, so why does the option to look at the planet's surface from a distance make it less interesting for you?
Doesn't the ADS' honk in it's own ruin already enough for you? (not talking to the ones that run around with an IDS on purpose

)
My thought went along the following: if you are out there to see things, then it won't matter much if you can see a planet's surface from a distance, you will either use it or you won't. It's not like the game forces you to look at it after you scanned it.
The same goes for the ADS honking, aside the fact that everything will be uncovered is it also an option to use the system map to "cherry pick" what you're looking into or not, the nav panel has also the whole system available.
So how much would "true" explorers really be affected by an option that can simply be ignored if not desired?
If you want to see planets up close and find them through SC then the surface map is not stopping you, on the other is the lack of it (from honking) forcing the ones who have a very specific interest in terrain features to go up to planets which might in the end be uninteresting and therefore a waste of time.
True, they could find something unexpected and still interesting on that way, but the same could be said about them being able to move quickly on and going to other places.