My husband was tongue tied as a child and it caused him some speech issues. I believe they tried speech therapy because he had a strong lisp. He was being made fun of in school. Therefore, he did eventually have it clipped. From what his mother and him told me at age 8 it was pretty horrid experience for him. They had put him under anesthesia, which he had a bad reaction to. (I'm a nurse and every person experience with the same procedure is different.)
Well, our daughter was born last year and she was also tongue tied. It was diagnosed before we even left the hospital. I was told it was not a major concern but may affect her nursing or speech later on. Well she nursed like a champ but was extremely painful for me. We went to see a ENT, they explained that some kids have trouble licking ice cream, and one story of an older girl who had trouble kissing her boyfriend. (Not that it was important at our time, just something to consider.) Since my husband had a bad experience getting it clipped later in life, we decided to clip hers early. We did it around 2-3 months old. It was done in clinic with my husband holding her. She handled it like a champ. They numbed with oral gel, snipped it, then all done. Minimal bleeding. She didn't cry until the doctor wanted to look a second time after clipping.
All that being said, it probably is not going to affect overall health but may affect in some psychological ways. Or it may be over come and you may never know it's there.