I very much enjoy the concept of combat tonics and found the Feisty Feline Tonic to be a funny addition. Though I would like to see more, like perhaps a Dragon Elimination Raid Vehicles (DERV)/Golem suit combat tonic so I can live my dream of roaming Tyria in a comfortable padded seat while smashing bad guys with giant mecha fists? Or how about to be more relevant to the current story theme, a combat tonic that allows you to take a Spirit animal form?
You could say that these would take away from the racial skills that already do these as they would no longer be exclusive to those races. But these skills and the tonics are pretty much the same as they are woefully undesirable being weak, class skills are just better in every way and the only difference is transform skills have a timer, cooldown and racially exclusive and tonics would not. So why not as just a fun little gimmick?
Also Tengu combat tonic when?