If I do a couple of 10km rides in a day, there is no back ache or anything. So its not urgent. I'm recently back into road biking, after a very long break, so yes may just leave it for now.If you are comfortable, leave it, that is the most important point. I went from 100 to 90 thinking that I would be more comfortable but actually was worse. What I did was change the bars to Spez hover, as the spacers were maxed out. That made mine less aggressive.
As a side, as to obscuring the view of the axle it depends if you are on the hoods or drops. IMO. I am 50/50 so sometimes thereabouts obscured.
No aches, no lack of control. Just puts me in an aggressive position. That could just be adjusting back to road biking though.I did find that 10mm made a difference, not blindingly obvious at first. I have three road bikes, 2 came with 100mm stems and the other 110mm.
The first one with 100mm I changed to 90 as I was having neck problems and so changed the one with 110mm to 90mm. ( I had already gone down to 100mm) and I thought that I had cracked it but I had`nt. After a longer ride the aches came back. So, I went back to 100mm and bought hover bars and that cured the problem as I was too low.
The latest bike which came with 100mm I have fitted the previously redundant 110mm stem. That bike too I fitted the hover bar to. It may not look cool in some circles but it`s my neck that appreciates it. What is the drop from saddle to bar ? A 10km ride is quite a short ride, in as much that any problems may not manifest. If you are OK, then leave things as they are for the time being.
No, I'll have a look at see of that's possible.Have you already tried flipping the stem positive (upwards), presuming is doesn't have a zero angle stem, to raise the stack and lower the reach a bit?