Yes. Those are called parans. They're definitely secondary, but sometimes are a main factor distinguishing one area from another. For example, a friend moved from Los Angeles to San Diego - not a very long distance at all - but picked up a Sun-Neptune paran in San Diego that had her feeling dependent and unproductive, which she couldn't stand, so she moved back to LA. The feelings went away.
There's no reason east or west of the line should have a different meaning.Here is what Astro.com shows for Debrecen, the 2nd largest city in Hungary. I wonder whether the bolded ones could be too difficult for me, but Debrecen is to the west of my Jupiter line, which is a better place than to the east of the line:
I don't think there has been enough work done with Chiron to know what it means for sure. One could argue, of course, that Saturn with anything and Neptune with anything would be a problem, though we don't know importance (strength) to give it. Yes, I see your Sun-Jupiter, Moon-Mercury, and Mercury-Uranus lies slicing right through Slovakia, so not too far from Hungary (I'd have to do a separate calculation to see their orb for Debreczen, with Sun-Jupiter further north, exactly at the latitude of Wadowice.Crossing Chiron/Neptune
These are a bit time-consuming to calculate carefully, but I'll take a few minutes to confirm these right now.
The map discloses as approximately present for Hungary, Chiron-Neptune, Venus-Uranus, Moon-Mercury, Saturn-Chiron, and Sun-Jupiter, and also Mars-Chiron which wasn't on your list. From careful calculation, here is what I get using 1° orbs, for Debreczen. (In addition, you have a Saturn-Uranus paran that is present at all locations on earth, 0°50'.) For each one, I've placed at the end of the line the specific angles the planets are on when they form the paran; for example, you have Mercury on Descendant at the same time Chiron is on MC, which is what forms their "crossing."
0°09' Saturn-Chiron (Asc/Dsc)
0°14' Mercury-Chiron (Dsc/MC)
0°19' Venus-Uranus (Asc/Dsc)
0°19' Chiron-Neptune (Asc/Dsc)
0°36' Mars-Neptune (Asc/MC)
I'd worry a bit about the Mars-Neptune, which can be treacherous and poisonous; but possibly you can use its energy in your music? (I don't know what you play or how you play it, there are several genres that live deeply in a Mars-Neptune state.)
Sun-Jupiter must be Sun on IC when Jupiter is on Asc. For this location, their orb is 1°05'. (Some people count up to 2°, I was being more conservative with 1°.) Moon-Mercury must be Moon on Dsc with Mercury on IC, which is 1°43' for this city.