In my opinion, I think the Alliance and the MTS Centre should be blamed 50/50. For starters, Great point DoyleG, The MTS Centre definately needs to learn more about juggling dates. Here is a scenario that may happen in a few years (unlikely but never know). Right now in Winnipeg there are, if you include the Winnipeg Alliance four professional sports teams (two in the summer: Winnipeg Goldeyes and Winnipeg Blue Bombers) and two in the winter (Manitoba Moose and now the Winnipeg Alliance). Both the Moose and Alliance play at the MTS Centre. Now lets say in 2009, Winnipeg (hypothetically) is announced to get (remember lets pretend) a National Lacrosse League team (very unlikely and remote but you never know) that starts play in winter in 2010. With the MTS Centre hosting (I believe)the 2010 Scott tournament of Hearts, the Manitoba Moose playing their and Winnipeg Alliance, in a pretend scenario it would be very crowded. What would they do in this situation. They would have to juggle very carefully. You obviously would not boot out the Moose all season. The Scotts are a money maker, the pretend NLL team could draw 4000 a night when the moose are not playing and the Alliance could make a good alternative and draw maybe at most 3500.
The thing with the MTS Centre is there is only so many concerts that can go around. The MTS Centre needs to fill dates. They need a second tenant and thus the Alliance could be a perfect fit, if They drew the 4000-7000 they are looking for. Unlikely though. Basically that is what stuff like indoor soccer, indoor lacrosse and arena football are for. To fill up space between when hockey, basketball teams are not playing and when concerts are not playing. It is like eye candy. Fun to watch, but nothing like the real thing.
The MTS Centre could easily juggle sporting events on the same day if they wanted to. Case in point, they could have the Manitoba Moose play in the afternoon and the Alliance play at night, or vice versa. It has been done before in many other arenas in North America. I recall that the Minnesota Wild of the NHL played a game then right after the crew got the area ready for a Minnesota Swarm Indoor lacrosse game, which was played at 11 o'clock at night on a Saturday.
As for the CMISL's and Alliance's part, they are partly to blame, because they did not press for alternatives. I am sure they could have easily found spots at the MTS Centre if they pressed a little harder. I think the Winnipeg Alliance have some work cut out for them in terms of getting good press coverage (please goodness me do not go 0-16. Please win a bunch of games this year and give the fans hope for 2009/2010) and reconnecting with those fans who might have been turned off, when they were forced to play on the road. Like I said, it doesn't hurt if the Alliance are winning a lot of their games, rather then getting toasted every game like they were last season. The Alliance have NEVER one a game YET in the CMISL.