As a new user, I bring to RTM my experience in floor plan design. My design philosophy is ergonomic - don't cram stuff into a "design", instead, design from the need.
When I saw the Google Calendar link I thought, "Great, I have a Google calendar I haven't used for quite a while. Maybe this will make it useful enough for me."
Then I realized that it didn't make sense for me to outsource RTM tasks to Google Calendar when I could have my own custom calendar within RTM. Why squander wasted white space in Google Calendar (days without tasks/events) when RTM allows you to create a streamlined custom calendar of its own?
Try it. Create a Smartlist called Calendar by searching for a tag called 'Event' (or whatever). Use this tag on every event/appointment/anniversary (one time or repeatable as needed) that you would normally put into Google Calendar and create them as tasks with each having the 'Event' tag.
Then the Calendar Smartlist you created contains nothing but calendar entries (sort by date), without any unneeded 'white space' and retaining all of the task parameters.
Why use two apps with a problematic relationship when one will do?
I think I like your app.