If she got invited to WCU’s Honors Program, I hope she gets in - it’s quite good and selective, and there are definite perks that would make her first year there better than the “regular” WCU.
In addition, you could set the money “saved” aside to pay for schooling at PSU. She could apply in the Spring of the freshman year, or, if that doesn’t work, in the spring of her sophomore year. The value the PSU degree in engineering would have is definitely worth it - the resources, opportunities, and job offerings simply aren’t the same for West Chester, but for her first year or two, Honors Program at WCu would be a pretty good alternative to UP classes.
A downside is that with the 2+2, she’d be guaranteed a seat at UP as long as she does okay at Brandywine (and clearly there wouldn’t be much competition - if she was invited to WCU’s Honors College, she’d likely be bored to death at Brandywine, because the classes there are geared toward their average student, but of course she could be taking 21 credits per semester there and with AP credit might be able to switch campuses faster?) If she goes to WCU, she’ll have to keep her grades up and it’ll keep her under more pressure, since transferring is not guaranteed. In addition, she’ll have to make friends when she transfers. She could see if she can transfer into Shreyer or through Paterno Scholars, so she’d have a small “honors” community at the UP campus.