akhi, you two will get the visa for sure inshaAllah.
your wife has visited you so many times and you two have been together for years mashaAllah. I know it's scary reading those comments but people with big red flags have gotten the visa after the interview.
your flags are soo small!
the interview will be your chance to show them how real and genuine your marriage is inshaAllah.
continue to make lots and lots of duaa.. especially in sujood. ;D
May Allah make this easier on you two and make this a fast and successful process.
ameen.
good luck and praying for the best