Is there ever going to be someone else that can get goblin girls, goblin gf, and fem percy pregnant.
On my fem playthroughs they feel left out despite being able to fuck other people or has room scenes of them fucking.
A farm stud character(s) would be nice for the farm.
Percy if they have bits can leave the goblin gf with child from a threesome, the gobwife points out with goblin law any kids she has belongs to her 'husband', full stop, but that's not what you're asking. Hm.
It's an interesting question. If Gobwife doesn't get seeded, there is no First, for example. However, Percy's kid and big moment is very much tied to the protagonist. A lot of emotions and such packed into there. A surrogate could possibly work, but I dunno how many extra tags and flags regarding story would be required to make it function, especially in the future.
Also there's the issue of the cast accepting it, which the mileage can vary. Bess loses her shit when Meat tried to breed her, for example. Not to say it couldn't be smoothed out by the powers of smooth talking hero(ine) protagonist.
Snekk looks to be making alternate ways for characters to exist regardless, or due to plumbing, so it's not entirely unlikely a character could end up filling that void.
Meat (if male) has plenty of side moments banging gobs or Percy at the farm, I suppose. Bill... is a demon, so maybe no. Not to say magic, plot, or whatever couldn't tweak that.
Technically, 'you' is partially
part of the protagonist, so by that logic they would be able to pass on your wonky magic mojo? Maybe?
Loksi will be likely pounding and getting pounded to make a new generation of elves.
And of course, there are still two other continents to explore in the future.
A bit of a stopgap cheat, and again, not what you are asking for, but since there's a clear mention and use of a strapon in several interactions with different important npc's (such as Dana), maybe a magic upgrade to have it function for breeding... but in that case, why wouldn't one just go futa? Especially if it's convenient enough to swap back.
Ritual spell or something? Hospitals exist, so I suppose there's that angle too.