Estimates without release capacity

As a Product Manager, I would like be able to capture feature estimates without having the release capacity feature.  I don't track capacity at the release level -- at least not in the way Aha! seems to work today.  I manage my capacity across all products and releases en masse.  I do not set capacity for each individual release because we have multiple releases going on simultaneously.  The work around is to either be under- or over-capacity by assigning an arbitrary capacity to the corresponding releases.  Not a show-stopper, but it would be nice to suppress the release capacity while keeping my feature estimates, but it appears they only travel together.