That is not necessarily true. LISD has rezoning that kicks in starting in Fall of 2024 and it will make a significant difference to all of the schools. This UIL snapshot and realignment are before any rezoning happens so it does not take it into account. The rezoning is specifically designed to address declining numbers at CP, Vista Ridge, and Vandegrift and increasing numbers at Leander, Rouse, and Glenn. The projections are that all LISD schools will be near or within 6A class sizes in the next 2 years based on the middle school populations and re-zoning. A 7th high school is being planned. Here is a link to the district projections. Note that even the 2024-2025 school year would have CP as close to 6A as Leander is now and all other LISD schools in 6A based on the new cutoff.
https://drive.google.com/file/d/1xi13D2Qdqu1GCZkFMjik75H0ln5uvG4J/view