Yes, I think they are engaged too.
As for people thinking that she is not the "right one" that is for Harry to decide and it looks like he has.
They are not kids, they are in or approaching their mid-30's. If it goes well-I pray it does, I love Harry-then all will be well. If it starts off like a house on fire and then flames out after a few years of marriage a la Andrew and Sarah, well, it won't be the first time in the BRF or in any Royal family and it's still no big deal.
I dread the inevitable comparisons between the DoC and Meghan and I feel that they are unfair as each woman-even though very different-brings unique and wonderful things to the House of Windsor.
But there will be comparisons and it will get nasty, I think.