Good news, folks. I reached out to Rami Ismail of Vlambeer via Twitter yesterday, and finally got a response from him re: the Super Crate Box iOS update! Looks like there's still going to be a little bit of a wait, but there is light at the end of the tunnel for what is considered by many of us to be one of the all-time classic games on iOS. See his response for yourself:
Lol I feel the same way, but some contact is better than no contact. I hate that this game has up to this point gotten the NBA Jam treatment, but as one of my favourite games on iOS, it's nice to know that the update has not been totally forgotten about by the dev.