i think it took a while for ANR designers to figure out agendas, but they had some weird math to work with from the original game.
ONR had a lot of 5/3s, 3/2s, and 3/1s, but they also pushed the design space a lot (sometimes to absurd levels). here are some values for ONR agendas
9/6 (became gov takeover almost word-for-word)
they also had a lot of 5/2 and 4/3 and they didn’t have many 4/2 until the second set
the numbers were hella weird, and every agenda (except the 4/4) did something
and the 4/4 was basically the most broken thing in the game once players figured it out because you just scored 2 to win, and it was really easy to score (more on that later). being blank didn’t matter nearly as much as the original designers thought it would
it was also Vital rarity, which means you would get it guaranteed in the starter set
also, notable, no 2/1s or any 0-point agendas
so ANR figured out a formula: 1 point for every 3 clicks
so you’d get 1 point for one turn (install and 2 advancements)
3 points for two turns (install, advance twice then three more times the next turn)
2 for anything inbetween
a lot of reprints had to be changed quite a bit to fit this formula:
Private Security Force: originally worth 3 points (otherwise the same)
The Cleaners: originally only 4 advancement requirement
Corporate War: originally a 3/3 (also all the 7s were 12s)
some were actually buffed a bit. Mandatory Upgrades was a 6/1 and Project Beale was originally a 3/1, for example
so they had to fit all of these cards to this new formula, but you would invest all this time building your remote, a whole turn and 2 bits to install and advance 3 points, and the tempo loss if the runner stole it was huge. they’re almost halfway to winning and you’re behind those points, 3 clicks, and 2 credits. the cost wasn’t worth it, and all these agendas were being played in a game that was vastly different from when they were originally designed.
in ONR, you didn’t need to build a remote to score 5/3s because the FA options were pretty crazy. in addition to Biotic Labor, there were cards for 3 and even 4 extra advancement counters in one click (they all gave advancements instead of additional actions like Biotic Labor). they were expensive, but remember siphon only originally stole 1 credit and also gave you 3 tags
there was also a set of 3/1s that lowered the difficulty of all agendas of a certain type after they were scored (black ops, research, initiative, etc.). it should be noted that they didn’t work on themselves (the one that reduced black ops agendas was a research, for example)
but you could score 1 or 2 and start FAing out some of your higher-point agendas.
so it was a conscious design choice to scale down fast advance in ANR. SanSan City Grid, Biotic Labor, and Astroscript were just 1 extra advancement. sure, you could combine a few together to get multiple triggers in one turn for a 4/2 or a 5/3, but it became so much easier to FA a 3/2 because you only needed 1 extra advancement to do it. even 3/1s were easy to FA out, but why bother when you can just FA a 2/1 on its own?
it wasn’t until Jeeves was released that corps started semi-reliably FAing 5/3s, but this was when Astroscript and SanSanCity Grid still existed
i think a lot of people can agree that this would significantly change the game if it were possible to FA out 3 or more points in a single turn… with a single card
nerfing fast advance from the original game was another thing that made 5/3s much harder for the corp. not that this was necessarily a bad thing, just that the payoff wasn’t worth the risk
plus, like @jdc_wolfpack pointed out, having things like NGO Front makes a great bluff for a 5/3 agenda.
the options we had early on were things like Thomas Haas, Test Ground, Exposé… things that weren’t really all that great if they didn’t bluff a run into the scoring remote. the reason NGO Front works so well is because it’s really solid even if it doesn’t bait a run
this is all why it took so long for the designers to figure out reasonable numbers for 5/3s other than ‘it’s only 2 for the runner’