Maybe the strategy 2degrees chose is proving to work, by only providing for 1/3rd of the market and NOT overloading their systems; it is proving to be a better strategy than XT.
(I say 1/3rd because plans and data are now a vital part of any market mix.)
I have always thought of 2degrees first few months as a beta test. Data and plans are the next big areas to improve and you need to be reliable for that.