At the moment the gap in the teeth is not a problem, in fact it's a good thing as it means more space for the adult teeth when they do come through
Lip ties tend to move upwards with growth, so things should improve with time. It's very rare that we see a teenaged patient with a lip tie severe enough to need removing. He may well do something like Elsie did, she fell off a chair and fixed her lip tie herself!
I don't know as much about tongue ties as I'd like to, but I think as long as he's eating/BFing fine then there's no real need to worry there either. I see quite a lot of tongue ties of varying degrees, none of which seem to cause any problems.
Mummy to M - September 1998, D - October 2007, and E - May 2010. All BF, cloth nappies, and carried in the same sling, not sure BLW existed in the 90s though!