I'm a big spoilerphobe myself and absolutely don't want to spoil this glorious game, but I don't think anything so far has been that bad. Some bonus costumes, some weapon and shield graphics, some colour palette options...this is actually an amazing time to jump before dungeons, bosses, world events, towns, story spoilers and cutscenes start to hit.
If you have given into temptation already, it's not too late to come away unscathed. Just don't tempt fate again.
Agreed. Nothing has been that spoilery imo. Once story stuff that provides context starts dropping, then it gets serious.