They mention the 9 is overstaffed at slightly more than 7 crews and the 88/90 is overstaffed at slightly less than 5 crews in the March newsletter.

The 737 is referenced as being built up for coming deliveries, meaning more pilots than currently needed. They're over 7 crews too.

They specifically mentioned the 717 needs 7 crews, but that's for the build up of training as they're limited there too for how many crews they can train in a month. If 5 crews is overstaffed on the proverbial backbone of the fleet, I seriously doubt 7 crews will last on the 717 either.
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Now let me make something clear, I'm not saying any of the staffing levels are nefarious. They're what we allow. I just think the notion that we're paid less in W2s than SWA pilots because they have this uber-high utilization may not be the case at all when you look at similar domestic only aircraft. You read that welcome packet and you see how their credit pay builds up fast. Every SWA pilot I talk to seems to be in the mid 70s to low 80s in flight hours per month but not in pay. But people can call me disingenuous but I'm just trying to figure out the truth via an excel spreadsheet and posted data.