  The LSST survey was designed to deliver transformative results for four
primary objectives: constraining dark energy and dark matter, taking an
inventory of the Solar System, exploring the transient optical sky, and mapping
the Milky Way. While the LSST Wide-Fast-Deep survey and accompanying Deep
Drilling and mini-surveys will be ground-breaking for each of these areas,
there remain competing demands on the survey area, depth, and temporal coverage
amid a desire to maximize all three. In this white paper, we seek to address a
principal source of tension between the different LSST science collaborations,
that of the survey area and depth that they each need in the parts of the sky
that they care about. We present simple tools which can be used to explore
trades between the area surveyed by LSST and the number of visits available per
field and then use these tools to propose a change to the baseline survey
strategy. Specifically, we propose to reconfigure the WFD footprint to consist
of low-extinction regions (limited by galactic latitude), with the number of
visits per field in WFD limited by the LSST Science Requirements Document (SRD)
design goal, and suggest assignment of the remaining LSST visits to the full
visible LSST sky. This proposal addresses concerns with the WFD footprint
raised by the DESC (as 25 percent of the current baseline WFD region is not
usable for dark energy science due to MW dust extinction), eases the time
required for the NES and SCP mini-surveys (since in our proposal they would
partially fall into the modified WFD footprint), raises the number of visits
previously assigned to the GP region, and increases the overlap with DESI and
other Northern hemisphere follow-up facilities. This proposal alleviates many
of the current concerns of Science Collaborations that represent the four
scientific pillars of LSST and provides a Big Sky approach to cadence
diplomacy.
