The texture bleeding in FSX has been fixed a while ago, with the .BGL posted here:
http://www.fsdreamteam.com/forum/index.php?topic=2918.msg29838#msg29838Which is also included in the current installer. In any case, yes, Mesh Resolution should probably be always set to 100, it's not really an fps-heavy option so, it can be left there without too much problems.