Over the years I (and others) have consistently requested that you NOT update during GuildWars. This means from 00:01 to 23:59 on Thursday & Sunday. Even though this is the English server, the patrons are disbursed globally and includes multiple regions and time zones. Regardless as to when you decide to take the game down during the aforementioned period you are decreasing the viable run time of one or more of those regions / time zones which negatively impacts most guilds which are also composed of global membership.
This becomes an even bigger problem should there be any issues with the members actually being able to update their game upon completion, or if the update contains any bugs which causes loading issues, connection failures or crashing. Currently the completion of all GuildWar runs is basically the only mandatory requirement for the majority of the active guilds, so it is essential that members be able to comply without any unnecessary issues such as those potentially presented by updates occurring on either of the days the feature runs.
I don't know what more I can say to express to you how important it is that this suggestion be implemented on a continuous basis and not just for one or two updates.
Follow IGG @Facebook.com/IGG Follow CC @Facebook.com/CastleClash