I have a question regarding the construction point cost increase for T2/3 ports. Am I understanding correctly that for the 1st and 2nd T2/3 port the costs are the normal amounts and then for the 3rd one onwards they double. No matter how many other things I build? It always increases for the 3rd T2/3 port?
Various groups have been testing how the doubling works. The data so far seems to indicate (and this really should all be in the codex):
The initial station is ignored when counting stations for the doubling.
The "ports" that cause doubling are:
-Tier 2 starports (Coriolis and Asteroid Base)
-Tier 3 starports (Ocellus and Orbis)
-Tier 3 ground bases
All other buildings in the system are ignored, both in that their building points don't change, and building them doesn't trigger the doubling.
My main issue is that the number of build points to build a tier 2 port is significantly less than the build points to build a tier 3, yet both seem to be doubled.
A tier 2 starport requires 3 tier 2 build points. Tier 2 build points are earned by building tier 1 facilities. Thus, to build a tier 2 starport I only have to build 3 total tier 1 facilities.
A tier 3 starport or ground base requires 6 tier 3 build points. Tier 3 build points are earned by building tier 2 facilities. Most tier 2 facilities require one tier 2 build point, so to earn a tier 3 build point, two facilities must be built, a tier 1 facility and a tier 2 facility. Thus, to construct a tier 3 facility, a total of 12 facilities must be built, 6 tier 1 facilities and 6 tier 2 facilities.
Lets say I have a total of 30 build slots in my system, and I want to build 2 tier 2 starports and 1 tier 3 ground base. If I build the 2 tier 2 starports first, this only costs me 8 total building slots, leaving 22 slots. However, now that the tier 3 cost has doubled to 12 build points, I can never build a tier 3, because to do so would require a total of 25 more build slots, I can never earn the required tier 3 points, because it would require a total of 33 build slots in the system, and I only have 30.
Now take the same system, but this time I build the tier 3 planetary port first, by building 12 facilities to earn the 6 tier 3 build points. I've filled 13 build slots so far. Now I build a tier 2 starport, filling 4 more build slots, raising the total to 17. Now the doubling kicks in, and the next tier 2 starport costs 6 (or maybe 5, since the tier 2 doesn't double based on those who tested?) Either way, this new station requires either 10 or 12 facilities, but I can actually finish my third port, because my total build slots needed is either 28 or 30.
Thus because any tier 2 or tier 3 "port" causes the double/increase, this system is very unintuitive, and the order in which you build matters. If you want both tier 2 and tier 3 ports, to maximize the number of "ports" you must build the tier 3 ports first. But since we need tier 2 facilities just to earn tier 3 build points, it makes no sense that building tier 2 facilities can actually cause the cost of tier 3 facilities to increase.
My primary recomendation is to remove the cost increase entirely. We already have to build 12 prerequisites before building a tier 3 planetary port. Increasing that to 24 prerequisites arbitrarily just feels disheartening, and makes me not want to try the mechanic at all.
However, if FDev really feels that a cost increase is required, then separate the cost increase for tier 2 ports from the cost increase of tier 3 ports. After I build two tier 2 starports, the next tier 2 starport would increase in cost, but the tier 3 cost should stay the same, at 6 build points. Then, once I build two tier 3 ports, the third tier 3 port can increase in cost, but not double, maybe only go to 9 build points. This system would not penalize a player for building their ports in the non-optimal order.