Context
Ever since I've started doing longer endless runs, I've started disliking the Merchant/Tycoon vouchers more and more. Especially Planet Merchant and especially Planet Tycoon. With no vouchers, you see on average 5 jokers for every 2 consumables. But with all 4 vouchers, for every 5 jokers you see 15!!! consumables. This makes rolling for what you need in the endgame incredibly difficult.
At the same time, planet cards quickly become almost completely useless. You specialize into 1-2 hands and the rest are just noise, but even for the 1-2 hand types you actually play, the added score becomes miniscule.
Similarly, tarot cards become more and more useless the better you have shaped your deck, and even if you do still need them, at most you need 1-3 to use next round, and 2 or 3 for free money/jokers.
Personally, I stopped buying Planet Merchant at all, and generally I would buy Tarot Merchant but not Tycoon. This comes with the downside that you might see these vouchers multiple times instead of ones you actually want. I don't think this is good game design, to me it seems like vouchers are supposed to be good for you, period. Not carefully taken risks like spectral cards.
My Solution
Merchant and Tycoon vouchers no longer affect the rate of consumables in the shop. Instead, every time you are in the shop, you get a free 3 card pack for having Merchant, and a 5 card pack for having Tycoon, of the appropriate type, in addition to the random 2 packs you can buy.
Why is this better?
The vouchers are now purely beneficial with no downsides. Your rerolls don't get completely destroyed by useless cards you aren't ever buying.
You have more opportunities to trigger effects on pack openings (Telescope, Red Card, Hallucination).
You have more opportunities to use tarot cards to modify your deck while in the shop and get use out of Omen voucher.