Thank you for the feedback.
SergeiBaklan Yes, we do not have full function coverage in the debugger. There will be more support coming, but in general, as this is a Labs feature we wont get to 100%.
tamtark I hope we can get dynamic array support! The " " issue you saw is a bug with the rendering and we are working on a fix.
Sameer_Bhide We do not have the numbers defined anywhere officially, but we may change it over time. We should have support for FILTER soon.
jflynnz Because we are running as an add-in, we limit the number of cells we read from Excel for performance. The spill reference is probably causing this. I appreciate this is frustrating. We'll think about changing the restrictions (or maybe allowing users to change), but we have to be mindful about resources and keeping in mind this is experimental.
lori_m Thanks for finding this! We looked into this a little more. but I cannot promise a fix at this time.
Thanks again for all the feedback.