Totally, it's all about balance. DayZ will always have it's core fan base that stays true to it's original hardcore vision. Although, having this as the only option will also cut out a large potential player base... A lot of these guys claim they want DayZ, but in reality they want something close, but a little more diluted and accessible. I feel that's where modders can step in and satisfy this need.
I think DayZ should implement the base building mechanics, finish sorting the animations, then just straight into beta. Iron out those kinks, then release as is. People get the vanilla DayZ experience that start all this, then modders can cater for the rest!
Foot note... I started with DayZ, then moved to Exile for more end game content. I still hold out hope that DayZ Will prove what we've all been searching for