I don’t understand the question. What difference are you expecting between the size of the tiles and the scale of the tiles. Those are two words for the same concept.
My English is not good, I mean, I can’t adjust the size of the tiles to my satisfaction by zooming through the Z key. It’s either too big or too small.
Zoom levels are multiples of two. Using any other number would produce bad results.
your best bet would be to find a tileset that is sized differently, and see if it has a zoom that matches better with what you want. Don’t expect much though, the scaling will be simmilar, but if you have a different start point maybe you can find something that is more aesthetically pleasing to you.
I usually end up using multiple zooms depending on what Im doing, and sometimes even multiple tile-sets if the set I’m using is missing too many assets relevant to the local area/items.