Okay - I'm posting about a friend's dog (Ann, I hope you don't mind! <G>) but here is a PERFECT example of what you were told and how it's complete BS!! LOL
Multi V-1, Multi BISS Am/Can CH Yngo van het Dornedal Can CDX, Am CD, Am/Can TD, SchHII, BST, BH, TT, CGC
Mike takes this dog tracking CONSTANTLY. He also trains him in Schutzhund. He also breeds him. He also shows him! And all with LOTS OF SUCCESS!! Yngo was out working on his SchHIII and a few weeks later went 2003 MRC Specialty Winners Dog and received an Award of Merit there as well. Yngo was also inducted into the MRC Hall of Fame that same year.
So I'll tell you what - ignore the person who contacted you. They may be right in that you may need to make some changes in order to get better critiques - but ask someone that you respect and value their opinion. Ask them where he's weak and where his strengths are. Your breeder, someone in your club, another breeder - but someone you like!
I've often found that people who approach others with advice, without being asked, are just looking to cash in some how (either by having you pay them or by degrading your dog to make their dog look better, etc.).
People who you respect and admire are the ones that you have to ask for their opinion.