The feature is new in core and can only improve with time plus constructive feedback.

Yes core places the logo at the top left but theme developers have the options to add styling support to their themes - you can put the logo anywhere you like for that matter.

In Actions (yet to be reviewed) I have the logo placed to the left of the site title which is done with a little css. It runs off a function so themers can very easily add filters for easy manipulation via say a plugin and it wouldn't be too difficult to add in retina support.

A very welcome addition IMHO - weldone team :)