readers that take issue with (that) are bound to be disappointed not matter what he (Niven) does.
I was far from disappointed with Ringworld: for me it is a good, middle of the road SF novel, having elements that make truly great SF as well as being a good example of the problems that are often cited as common criticisms of the genre as a whole. For that reason I think it is probably essential reading for anyone interested in SF not just as 'entertainment'. I have heard good things about some of the follow-ups too and will probably read them one day.
I think my enjoyment trumps anyone else's dislike.