As a confirmed GW fan, all the attention lauded on FS is of little consequence. I fail to see, in spite of its fame, why its any different to any other loco and especially why its had millions spent on it. Sure, its an icon of sorts but as has been said herein, by now its a bit of an ASP loco far removed from its LNER or earlier beginnings. The mags can't get enough of it, many recent issues have competing articles about it which means they are only repeating each others 'news'. Each of the other big four had their own comparable locomotives which are probably the favourites of many others. As for livery, possibly it should remain in its earliest form being the most authentic, then LNER and finally BR in ex LNE condition without all the hardware installed over the years.
Brian.