I just deleted version 4.5.2 and reinstalled 4.3.1. It now only takes 7 seconds to connect compared to over 30 with the newest version. All aspects of the game work great except I can't see events in the globe. Maps load quickly , money collects quickly. No annoying Game Center popups. This was a last ditch effort for me as I'm the type of player that doesn't have a lot of time to play during the day. A quick pop in from time to time to collect money and hit a target or boss. This became impossible with the newest version. I hope GREE can figure out a solution soon or after over 2 years it will be time to break the ties.
Ps. GREE if you have deleted your older version of MW and need a copy I would be happy to send you one. I still have 4.3.1 and 4.4