One thing I’ve noticed very recently is that Amy has started (within the last couple of days) pronouncing /fl/ as [fl].
For years before, she had pronounced it as [ɬ] instead (like Welsh ll or the second part of Klingon tlh; sounds like thl to some English speakers). So she’d say ɬannel, butterɬy, ɬower, etc.
On the one hand, I’m glad that her pronunciation is approaching the norm in this point; on the other hand, I hope that she doesn’t forget how to make the [ɬ] sound; it’s a fun little phone to have in one’s inventory :)
In other language development news: her (inter)dental fricatives [θ, ð] (English voiced and voiceless th) are still only occasionally there.
Those sounds don’t have a consistent replacement the way /fl/ did; she’ll say tank you but I’m taking a barf and (I think) mudder, farder, brudder.