Yea, that seems reasonable, when I _need_ to charge my phone, I plug it in.. When it's just on my table, I lay it on the wireless charger.. I'm also using the 85% charge limit to try and reduce wear, don't know if it works to be honest, but I figured I'll use it until I feel that the battery capacity is insufficient, then I will disable it.
Good! Slower charging is better for the battery's longevity.
Before I gave up on Galaxy phones I wouldn’t even use the wireless charging because of how hot the phone would get.