The tag end makes little to no difference to a fish, they most of the time do not care. If it does not affect a lure's performance in a negative way, it's fine.
Typical lures of 1/4 oz or heavier do not rely on the snap swivel for motion nor are less performing with it.
If finessing, this is where it sometimes makes a difference in lure performance. That small weight and going into deeper waters past that 30 ft depth it begins to show some. One thing is depth, water resistance from that distance. Lightweight lures tends to have less response or one feels less from that.
There are times when I prefer to tie directly to my jig. There are also times when I prefer to have that snap swivel that allows my jig to dance a little more than a direct tie. It almost follows the same concept to thread a soft plastic lure onto the whole hook or just hook point the soft plastic through the head only. It looks terrible when soft plastic is just hook point through the head only but if the fish wants it, I do it. One can dance the jig head more and the soft plastic wiggles more lively.
Test try in a glass jar or aquarium fish tank...see the subtle differences.