Fascinating development – I’m a member of a Presbyterian denomination currently, but was raised in the Lutheran church. Relatedly, a lot of things that seem to bother Presbyterians about Catholicism don’t bother me by virtue of my Lutheran background. For example, in Lutheran churches, it is quite common for the minister to, at some point in the service, pronounce forgiveness of sins in the first person: “I forgive you your sins in the name of the Father, and of the Son, and of the Holy Spirit”. This contrasts strongly with my Presbyterian experiences where the minister says “Your sins are forgiven”, and many Presbyterians I’ve talked to are offended at the Catholic “presumptuousness of the priest” to forgive sins using the first person. Regardless, a Lutheran church turning (back?) to Catholicism holds great personal interest for me.
I’ll offer a numerical comparison that I found helpful: the linked article mentions that the ALCC has ~11,000 members. The ever reliable ;-) Wikipedia page states that the Orthodox Presbyterian Church has about 30,000 members. It helped me get a grip on how big the ALCC is relative to other denominations.
I live near Kansas City where (as far as I can tell from their website,) the ALCC has two churches. I’d be curious to stop by sometime and see what distinctives the ALCC emphasizes – ie, what they do that’s different from a “typical” Roman rite Catholic service.