Much as I love MMultiAnalyzer, I don't find the collision display useful.
First of all, 95% of time the truly harmful frequency collisions are apparent without visual aids. It's akin to identifying pitch "problems" in Melodyne that weren't even audible until you could
see them, and then assuming that fixing every last one of them will make your vocals sound better.
Second, not all collisions are necessarily problematic. Sometimes, you do it on purpose. Imagine a chef complaining "I can't taste the salt!".