I'm 100% with you on this. I have a 2007 Giant Reign X (6.7 inches, lighter version of the Glory) with Rockshox Totems (7 inches and 1 1/8 steerer), 11 speed, dropper post and ztr flow/hope tech enduro rims. That frame is an excellent little piece of kit and is regarded as the DH's XC frame or the XC's DH frame. I get out once a week and have been getting decent Strava positions on climbs against people on dedicated enduro bikes with my build.
I simply cannot afford a newer and more modern enduro bike, but am happy to forgo a little more weight for something to hit the DH etc sections a little harder. The compromise is older kit, but more affordable. Ok it's not a perfect or ideal build, but certainly isn't a 'bad' build. Next step are offset shock bushings to alter the geometry. Also, I know they are a load heavier but out of preference I run coil shocks, were they air then that'd be ace on climbs.
I'm guessing you're after one bike to do everything on? I've got a spare pair of Shivers to stick on for DH fun...looking for a heavier spring too. They are spare though, as mentioned in a previous post, better to get a single kickass fork than enduro and DH. I've been really impressed with those Totems, they've been tuned and soak up huge rock impacts incredibly well. There'll be hardcore enduro riders yelling at this that those forks are way too excessive, but out of the whole build, they make the biggest difference in DH. 180mm single crowns are an excellent midway point for DH and enduro.
8 inches rear travel is too much for regular climbs, but 7 max would be ideal if you are looking for something a little more DH orientated.
As I've said, it's not an ideal build but the whole thing's worth £800 odd due to age, but deals with DH superb and climbs well (climbs as in offroad). If money was no object i'd have similar set up, but with a frame of similar weight and travel...and 27.5s. I hope this helps in some way.