It's not about making it as challenging as possible, it's about making it welcoming as well as challenging on certain maps. Yes, some maps may be a little bit easier, but the majority of maps are designed for 66 tickrate and 100 airaccelerate. Playing at 33 tickrate doesn't only make it harder to surf, it also makes it less responsive, and some maps are simply impossible to surf on. We'd also have to go through every map in the map rotation and remove the ones that don't work with 33 tickrate. Not to mention 70% of the current regulars would leave. I've gotten a lot of complaints the last couple of days. I, for one, am not up for the job of cleaning up the mapcycle after a change I don't even like to begin with.