I think it sounds like you have it under control. IMO part of raising a puppy is dealing with the issues other people instill in them, unfortunately. It can make walking a little nerve wracking when they're young but its good for them. This sounds like good early socialization to me. I would just be more vocal about what I am and am not ok with with others, such as them holding her harness ('please don't hold her harness, it makes her nervous') or when their dog is keying in on her in a way that makes you uncomfortable (I usually go with 'she's in training, she can't say hi').