If someone is more worried about being 'overshadowed' by a PC pet, don't worry about that nonsense. This is a roleplaying game and if you want to play as a squishy gun mage with a giant construct, more power to you if it is actually useful.
Your fun =/= the bloodrager being made a second wheel. Unless you blatantly optimize things with a cookie-cutter power build (Slumber Witch, anyone? How about the Mythic orbit thrower Barbarian with Body Bludgeon/Limitless Range?), I see no reason why it should even be an issue in the campaign.