I bought the bronze pack because I want to reserve a few names before anyone else can get them. And I’m sure I will play a bit during the headstart. But I’m in no rush.
The pet and the mount are good things to have - a pet collects loot for you and a mount lets you get around faster. However, there are quests early on in the game that reward you with a free pet and a free mount, so you don’t need to purchase anything to get both of those items. If you like the looks of the cat and the hydra mount that’s another issue entirely, because they do look pretty cool.