Sounds like a bit too much meat to me but better too much, although not every one will want 1/2 of meat. I would cook the smaller briskets if the are full packers. That will produce more bark and flavor and spread out the risk of the occasional difficult to cook brisket being such a big factor.
Jim - Another transplanted Texan
Former KCBS CBJ
Large and Medium Big Green Eggs , Black 18.5" WSM, Blue Weber Performer - Stainless, Green Weber OTG Kettle , Brinkmann SnP Pro, and a Stainless UDS. One retired Portable Kitchen grill.
Red Thermapen, Maverick ET-732, EdgePro Apex Sharpener.
Avatar is the original 1951 Weber Kettle