Hi,
some more data points. In short: I have no idea what this happiness level is about, and the correlation between amount of ships offered and tech level / development level is not visible in my system (Synuefe OU-F c27-4).
Security: 34
Tech-Level: 66
Wealth: 57
Standard of Living: 68
Development Level: 75
148 Points, 0% Happiness, 1479717 CR. Population: 501,200
Since my T3 refinery switched to full throttle, Inara shows up to 8 Commanders in my system (myself included). Titanium and Steel are nearly sold out now. No boom was triggered yet, but the influence of the faction controlling the refinery is spiking. Everything looks great... so, no idea what this happiness level is meant to reflect.
Then, I have two more systems with just one outpost each (one high-tech and one military), and both stay on 0% happiness without showing any decay due to my negligence.
Furthermore, as soon as I completed my second T3 ground port, the amount of ships in the first decreased from 22 to 20, and the second T3 ground port only offers 11 ships. Before today's thargsday tick, I added >20 tech points to the system, with no visible influence on the amount of ships and modules offered.
That means: two T3 ground ports in the same system offer different amounts of ships. However, one is a 0.9 extraction / 0.9 refinery, while the second is 1.0 agriculture. Today, I finalized another T2 agricultural settlement on the same body, but the T3 ground port is still at 1.0 agriculture. Either I have to wait another tick, or maybe, agriculture is capped at 1.0 economy? And, does the economy type of a station has an impact on the amount and type of ships / modules offered?
Lots of open questions...
EDIT: population added