The Cr does work i raided with it last night.. i also encountered this problem. I'm assuming you used it on a dummy lower than level 100 in shrine? For some reason it doesn't work on those.
'With the Feral druid part, can you change it to always open with rake when coming out of prowl.. Glyph gives you a 40s savage roar buff if you do this !' - With regards to this, Feral druids still use a dot snapshotting system, it doesn't snapshot trinket procs/procs but it does snapshot active buffs, such as savage roar. So you are losing out on a 40% Increase to thrash damage if you don't do as i mention.
Also, i notice that it is using Thrash single target, this is actually a dps loss, if you want any info on this ill be more than willing to help. I better use for the energy spent on thrash would be to use shred, and maintaining Savage roar uptime.. I noticed that the CR allowed this buff to fall off occasionally which is very bad haha!