This is certainly something I noticed coming from Pro|E into Creo. All too often the leader is too close to the 1st/last character. There should be a half-character space between the node and the end of the leader line.
This must be a completely revamped algorithm from The old Pro|E to Creo (maybe initiated in WF somewhere). I find the text locations to be unstable (when adding or removing leaders) and I already have an SPR in place for not properly snapping to grids. This was just a very poorly vetted "upgrade".