Hi,
Thanks for the interest in WooCommerce Tickets, see my answers below:
Do you have any way to capture specific information about event attendees? For example, I am often asked to get numbers of people with special dietary requirements, etc.
We currently do not have this built in, but you can use a plugin to modify the checkout of WooCommerce to get more information.
We do have a more advanced version of the ticketing plugins that will do this, but it is not released and I do not have a timelime when it might be, but it will be in beta soon.
I presume invoices get sent automatically from Woocommerce?
WooCommerce sends the receipt for the purchase just like any other product.
Let me know if you have any follow up questions.
Thanks