Is that about 3,000 per month increase in smerits that are possible to be distributed per 30 days?
Yes (3,545 to be exact).
On average, merit sources
(now) have less sMerit compared to what the average was prior to the upgrade/additions:
19,500/84
sources=
232.14 sMerits
23,045/120
sources=
192.04 sMerits
Based on the following comment, it's safe to say that "recently added merit sources
(36), have less sMerits compared to those 84 sources":
One thing that wasn't mentioned is that some existing merit sources seem to have gotten a source size increase as well, so there should be much more merit flowing.