I got better at making sets after Intrigue. I can believe that people playing the base set by itself might feel like it needs something. There are some duds, and those duds reduce strategic options. The base set has done great anyway, but you know, there's room for improvement.
Why not use this room? Doing 2-3 changes to the Goko base set (taking out duds, adding a better but still simple card from another set which would both improve the base and preview later sets, maybe adding one new card if you can talk Jay into releasing it as a promo for people playing with RL cards). If Goko really succeeds, then the clear majority of Dominion players in the world have not seen the game yet, it's not too late for small changes if they're going to improve the experience a lot.
I am trying to think of how to approach this without having any issues. I don't want to try to sell people overlapping products. I am not sold on the idea that Goko's audience will exceed Dominion's; it's nice to aim high though. Currently I think most people just buy everything, so any re-sorting of cards wouldn't make a difference there anyway; what you want is a veto list.
Anyway let's say we want a better introductory set. We can probably do better than the main set with a few swaps, but there's the overlap issue, so let's say, we just merge the main set and Intrigue into one set. To increase variety we'll make it larger - there are 50 cards so let's say we take 40 of them. The remaining 10 cards can go into a Leftovers product that people can ignore, although many will end up with it via buying everything.
I am not sure this plan is so great. Mostly I've just eliminated Intrigue as a product. When you're a new player, you only play pure main set if you start the game yourself or play the main set campaign. The main set campaign in the future will sprinkle in cards from Intrigue/Seaside/Prosperity to spice it up a little; it could go further in that direction although man I don't want to work on it more.
I am not thrilled with the idea of a boring promo irl so that it can be in the main set on Goko. The needs of a promo do not match the needs of a main set.
If we just stick in a few Goko-only cards then I think some of our current actual customers would be pissed.
The main set irl could be changed. Then it couldn't have the SdJ logo though. That's never going to be compelling. It also has an overlap problem. Let's say it has 5 new cards. You already own everything and feel like you have to buy a full large set to get the 5 new cards. You hate us. We need the 5 cards to be available as a separate product. It's not a good number of cards for a product. Let's say there are 12 new cards and we can sell them as a separate product. That separate product looks weird. It's these random simple redundant cards. It's not trivial to make 12 new worthwhile main set cards either; I do not have leftover simple cards worth making. Some people long for Dungeon but well 1) it's redundant, and 2) where are your other 11.
Let's say we just sprinkle in cards from expansions; to make expansions not look awful due to overlap we only take one from each large one. We take out 5 duds for a card each from Intrigue, Seaside, Prosperity, Hinterlands, Dark Ages, avoiding stuff like duration cards in favor of straightforward but interesting things. Online we already have just such a sampler for people with that card you scan in; you still have the duds but well have I mentioned that a veto list would be nice? IRL well like I said, no SdJ logo. It sounds okay otherwise. We could also ditch the Copper randomizer etc. and have 26 cards, dropping 4 for the new 5. Online there's no logo, but we can't just give that 5-card sampler to everyone because then it's like "ha ha you got that card to scan in for nothing." Let's say online there's a different 5-card sampler we just give away. We don't want to take out those 4-5 duds though, this would disappoint people who actually know the physical game, which I still think is most people. I am not thrilled with a 5-card Leftovers set. Again a veto list does the trick.
And again the main set campaign can just include non-main-set cards, that seems like the big trick. If I am a new player, probably I go straight to the campaigns. Those levels can include Chancellor less often and throw a Nobles at you somewhere. If I go to the multiplayer lobby then probably I join someone else's game and see all sorts of non-main-set things. Anyway I think improving the main set campaign is as good as it gets online.
For a better starting experience IRL, probably there are two things you can do. You can package the main set with a small expansion, although now your product is more expensive and maybe that's just self-defeating. Or you can do a retheme like the Hobby Japan ones; you lose the logo and totally overlap but kind of sort of deal with it by having new art.