They needed to do something considering the apparent drop-off in participation the last couple of years. I personally know a lot of players that did not like the July dates due to the heat in Vegas at that time.
However, I imagine that there will be a quite a few players (myself included) that will have difficulty with March, due to us having school age kids. Spring break usually occurs in March-April. The close proximity of the tournament to spring break will likely cause some schedule conflicts with family time off and vacation scheduling at work.
I liked it when they moved to the July dates, because we could have the kids stay/visit out of town family members, allowing me and my wife to go to Vegas for a few days and play some pool & have a mini vacation. With a March date, that will go out the window for us.
On the bright side, I just saved myself plane tickets out to Vegas, 5 nights at the Rio, multiple entry fees to the tournament, gambling losses..etc. etc. Think I will go commission a new cue for next year...