One other note to explain our thinking, or that probably influenced our thinking. At the time we settled on the rules, Brooklyn had just won 6 out of the last 7 championships, having perfected the 10WR, 10CB offense/defense. And while correlation does not equal causation, I will note that since we implemented the rule change, we have had four different league champions.
Where is billstein! Tell him we finally stopped the10 WRs system!
As always, discussions are ongoing around the matrix - a major issue is it serves two purposes, allowing position changes (ie player is RDE, from player page you convert him to SLB) and also where they can go on the depth chart / overrides.
Other issues around roster management are ongoing in MFN-TEST, so might be useful to take a look at the forums there, JDB has dedicated threads around changes under test.