I've been debating how to weigh into this thread. I was paedobaptised and then confirmed at 13 or 14 per usual UCCan practice (at least in the 1970s). Grandad baptised me and, with the minister's consent, joined in my confirmation, too. While I think me being confirmed was a given and there would have been a ruckus if I'd said "No", there wasn't really much risk of me not doing it. I was a reasonably faithful, if liberal, Christian at the time like the rest of my family. Perhaps more focussed on Jesus as the bringer of God's love to the world than on sin and salvation, but that was pretty much the mainstream approach in that church so not likely to cause a fuss.
But the question for me now, looking back over 40-ish years later, is whether it all really meant anything in the end. I'm no longer UCCan. I'm no longer even a Christian by my own estimation. And I could never have predicted my future spiritual course at 14. Perhaps, had confirmation happened in my late teens or twenties instead of my early teens, I might have been more hesitant about going ahead. Certainly values learned in that world inform me to this day, but I no longer subscribe to the theology that underlay them and, really, that's what the confirmation vows were about IIRC.
Which I guess brings it all back to whether paedobaptism+confirmation is really for the kids, or is more for the parents/congregation. Does it really confer anything lasting? Perhaps a single event, an "adult baptism" or "adult confirmation" at 18 (or thereabouts) for those who desired to make that commitment would be more meaningful and lasting. You could still have a child dedication/naming as we UUs do (or even a paedobaptism), but leave the meat and potatoes of vows and faith to an age when those involved might actually be somewhat settled in their faith. Because I wasn't at 14 even if I thought I was.
Just some thoughts from someone who's been there and done that and has gone in other directions since.