If the berserk macro is 1 line short and simple macro I don't think it bothers most healers and bards. I just happen to see those macros with 5+ lines with all sound effects added, that is when I get annoyed by it(same with pulling macros).
Thought I almost never esuna that 5 sec debuff anyways, since 2 secs is already gone to casting esuna and I can use the time much better than wasting my gcds for it (dps ftw!). Besides wars do have skills to use even when they are pacified, Brutal swing, Mercy stroke, Flash and deffensive cds say hello. And top of that as someone pointed out you can negate almost half of the debuff duration by timing your hits before it.
Bards may like the macro tho if they want to do good job, but still they don't need those 10 lines long macros to know that you have debuff.