Marty's description is pretty fair in respect of the course. It's certainly one of the more well-to-do courses in Edinburgh and Bruntsfield's daily lunches are well renowned, probably more so than the course itself.
Friday's Scotsman newspaper contained a 1/4 page article on the course changes which, according to the club's website, will mainly be rebunkering works "with the aim of re-styling the bunkers to be in keeping with the original Dr Mackenzie shapes, while harnessing modern lining technology and repositioning them to reflect the distances club golfers are now striking the ball.".
The current 12th is an ordinary connector hole so will be no great loss to the course however I always shudder when any club talks about creating "signature" holes, nevermind the fourth oldest in club in the world. With Mark's mention of plans including a pond, who knows what they have in mind! The shifting of the existing 13th to a par 5 may be a good move though, depending on where they position the new tee box, as it's presently a brutally difficult par 4 usually played into the prevailing wind and will play as a par 5 for the majority of players as it is.