Your suggestion is literally ''make this thing more expensive'' which will only make it more of a grind. I remember there was also someone proposing that ship prices increase by 5 times or so, again to prolong the early game. None of this is ''making more meaningful choices'', it's just play longer the rinse and repeat game to get the same thing. And only then do you remove the choices, since if someone wants to play mid game as soon as possible he has to grind forever.
I hear you. Unlike others, early game is my least favorite part of the game, and endgame (when player is high-powered) is probably my most favorite part, and the sooner I get out of the early game grind, the better.
The slower player progresses, the slower bounties should progress too.
Making things more expensive to extend the early game grind would be more useful as a Hard difficulty setting. Then again, it is only hard that it takes longer to reach endgame, but once there, it is not really harder, just player took longer to get there.
And WITH AI cores...hoo boy. they need much bigger drawbacks. It's soooo cliche and boring but maybe they need to go "kill all humans" in certain conditions, or maybe other factions need to actually react to you establishing a presence in the sector and hassling you instead of letting you grow into a superpower in relative peace.
I agree only because they make colony skills a total trap to take yourself. Pather cells might have been enough to stop me... if they worked. Since they do not, cores are practically risk-free.
On the other hand, I would like to be able to colonize the entire sector, and alpha cores in the current release enable this. I would not mind cores being demons that will always end badly... if I can comfortably colonize a dozen or more systems or otherwise do not need cores to run an empire.
As for other factions, that only works if they are still there. If not (i.e., only things left to kill are zombie pirates and hermit robots), then there is no one left to bother the player until player wants to pirate the robots. I do want to kill all factions to eliminate a major source of babysitting events. No core worlds, no more expeditions, no more inspections, no more defending helpless core worlds from zombies. Also, trying to colonize the whole sector includes killing core worlds so player can colonize and claim their worlds too!