they way i see it if they like sto then season 2 will be great, if they are unsure then season 2 might tip them into the like category. if you dislike or hate sto then i doubt season 2 will do much at all for those players.
i think its impossible to simple put a number on in and say season 2 will make x amount of players come back and love it or hate it. some will have waited for season 2, be disappointed and leave, some will come back and be happy.
but i do see it bringing some players back and i do see what they are doing as an improvement so either way i do think season 2 is and will be seen in positive way by the majority of people. i hope the number of klingons will start to steadily increase.
the weekly episodes could also be very important. i think they are a great idea and i hope those will be a big factor in making people log on regularly