to get the spell ID just google the spell and wowhead. The wowhead page that pops up top should be the one you want, and it should have the spell ID in the address bar.You should also note that some spells/abilities, have the spell itself and the buff under different spell IDs.
It seems to be a problem with the actual buff having a spell animation that freezes, or rather keeps the character in a special animation without allowing you to do anything else.If you notice, it happens whether you have tmorph or not, your cat will still stay in that animation for like 2 secs before you can do anything.I have never noticed this before myself until i saw some feral druids recently, but then again the last time i played a feral druid(before this week) was in wotlk.Also, activating Tiger's Fury/Berserk "freezes" the character till the buff duration ends. I think that replacing TF/zerk ID should fix it. Couldn't find those spells ID though
Anyway there is a way to fix the savage roar/tigers fury/berserk spell animation, just replace it with a spell with similar effects like bloodlust/heroism there might be other spells out there which are buffs with animations that may also work, maybe even some trinkets.As for the glyph ,that I was not able to find a solution for that yet, i tried changing the glyph spell id I found on wowhead but maybe it was not the right one,like I said above some spells have several spell Id's and one may just be the right one.