I quite like that actually, more than the original Holland thing. I do prefer the Welcome to Beiruit one or the Welcome to Schmolland one to the original one as well.
I like the other 'Welcome to..'s because they're cynical and unsentimental but I like this one, Lottie, because it's (not really, but similar to) what my boy's innocence is when he says things like 'I'm so lucky to have you as my mummy because you tickle me and we have fun and other mummies are boring' and 'aren't we lucky that it was me in your tummy and not a horrible daughter' and writes cards calling me the 'speshiallist mummy in the wurld'. I don't find those things cringy, cos it's him saying them, and I don't find your poem cringy for the same reason!
And I would take away my son's autism if possible, to make his life easier. That's why I like Beiruit and Schmolland as they're not so relentlessly upbeat and saying 'oooh, aren't you lucky to have a SN child' but lottie's is nice cos it's the child's perspective, I guess.