Making the warmup longer in exchange for keeping people out of queue is a great change, it makes siege games pop more often. However one consequence is the "Baravenos Encirclement" map still crashes extremely often at least on NA servers. It's possible to spend 10+ minutes in warmup just for the game to crash right before the game starts, or shortly after it starts and then the map pops up again the next time. This happened three times in a row yesterday so it was over 30 minutes of warmup+crashing.
May even be worth removing the map from the queue for a bit until it's issues can be sorted because it does seem to crash the most out of all the siege maps.