I played Muirfield for the first time this past May.
It's strength IMHO is the par 5's-very strategic IMHO and full of interest.
In the abence of any rollback/bifurcation news, I can easily see why Jack would want to lengthen his par 5's to retain the original intent/strategy(during the event)-regardless of what the reason is for increased length on tour.No different than the event he modeled his event and club after (ANGC) which has done reasonably well over the years
I can also see the need to address green firmness being a Tour site,and with a host(Jack) seeking to identify the best player.
If I were him I would respond with selective length and firmness as well.
In other news, I had a pro told me his greens recently stimped at 16.7 (he gushed as he told me "his Super had video of it")
I played that former classic course a couple of years ago, after a length finding and green flattening renovation-found the greens incredibly boring-a shame as it was once a gem.
One day, if there are any golfers left, golfers will admit slower,firmer sloped/tilted greens using interesting pins are tougher(if that's the goal)--and clubs will spend a lot less maintaining and renovating green surfaces, with firmer, more sustainable, more interesting greens that might even be considered BEFORE one reaches them.