I happened to be in Phoenix on business last week. Caught a Rockies/Brewers game at the Milwaukee stadium in Maryvale.
The thing about the Phoenix area is that all the teams are packed in close - Drive from Goodyear to Mesa - an hour and a half in traffic - and you've covered probably eight teams. Plus there's almost no rain. The weather is very predictable.
That said, I do hope they stay in Florida. It's a long, long trip to Arizona.