Everything is ship sets. LCAL 756 was last to get ship sets and that was about 3 months ago.
As for sabre. 737 is the largest fleet and this is the problem. They have been dealing with LCal 756 switch over the past 2 months and there have been issues. This is on an aircraft with far fewer departures than the 737. Also there are only so many Subject Matters Expert guys around. Or SMEs. So expect to initially see some delays when this gets rolled to the 737.
737 will roll our before too long. It's mainly a software switch for the airplane but a big switch vs phoenix. You can do the cbt but really after a few flights it will make sense. I still learn things here and there. I do like a lot of stuff on Sabre. I also wish it did a few things that phoenix did.
Once you reprogram how to hit buttons your all good.
Don't worry about it. I'm as dumb as the come and I didn't have too many problems.