A couple points of clarification from
@Haveaniceday . First, what they said about ORCA is true - some EE's make the switch when they can't swing it in the EE major, but it's also worth noting that EE is generally expected to grow a good bit, because a lot of people don't really stand what ORCA is and are therefore hesitant to apply for it, but then switch as they learn more. A lot of people think ORCA is the sweet spot - an in demand, technical major, but without lab reports like engineers or papers like government majors.
Secondly, as far as changing majors. It's not terribly difficult early on, but it does get hard eventually. It's never a guarantee, but I've never seen it denied personally. There's talk of making it harder to do by creating a "school of engineering" and a school of everything else (whatever they'd call that) and only admitting students to one, like is common in other schools. I heard of it as part of a group I was involved in last year, but I'm unsure if it's still an idea or not, so take it with a huge grain of salt. Anyways, what was said is partially true - there is a cap on majors, but it isn't terribly hard to change either.
Lastly, summer cadre are also there to teach, it's just in a different way. What you said rings very true, but I think it's important for incoming Swabs reading this to know that Cadre are there to teach and that although you'll be unfamiliar with their teaching method most likely, they do want you to succeed.
All in all, above post is very good and accurate advice.