If you play a sorcerer and tell Gale that, when he asks if you know about higher magic, he has some choice words about being a sorcerer. Mind you, he makes fun of you, if you are a wizard too ( 'Not very powerful...')
I believe his
exact words are "there is gust of weave around you, what i need is a tempest" ...
And im not sure here, but i feel like its exactly same response as for Wizards.
Anyway that is his responce to your snark ...
You can hardly take game responcible for you laughing to Gale that you are better than Wizard.

Also as far as i know, Withers provide respec ...
And it seems safe to asume you wouldnt be able to respec your party members... at least until they become your party members.

So ... i wouldnt expect this to cause problems.