I think excluding Gustav III's chess because it has Amazons is a very spurious reason - the Amazon is in my experience a very simple piece for chess players to learn to play with - people I've played with have had more difficulties with the Chinese cannon, for example.
Regarding time controls - how does that work with holidays, etc.? I am traveling abroad now and then (about every second or third month), which means up to a couple of weeks with limited possibilities to keep up with games. Also, I am away for a long time this year over Christmas and New Year - from the 16th of December up to 10th of January - if either of those would cause a trouble with the time controls for the tournament, then it is perhaps best if I withdraw before the start rather than failing to live up to my commitment and forfeiting games once the tournament is under way.