There doesn't seem to be a topic on this, and it's something I've been thinking about. I stopped ESO+ when the Content Pass was announced. I've looked at the offerings on ESO+ that Seasons is going to bring, and I'm not seeing anything that's worth my nearly 15 euros a month.
The craft bag is a nice-to-have, not indispensable. There is no real reason to do crafting in the game other than making things for yourself, it's really difficult to turn crafting into gold. Likewise the furniture vault, it's a handy place to store furniture if you're still wondering how to decorate your houses instead of turning them into furniture storage units. If I needed crowns for something, I would buy them on ESO+, which adds value to the crown purchase, or wait for a sale.
The extra XP, the monthly crowns - there's not much in the crown store that appeals, and everything you buy there is server-specific anyway. I filled up my EU DLC dungeons. I won't buy things like outfit or armoury slots because they are single character and not account wide, and I have no characters to favour specifically with something like this. But now - Seasons will bring account-wide Outfit slots!
And what do I really want? Armoury slots, so I can have lots of builds at hand.
Give me account-wide armoury slots - or a bank of them - and that would certainly make ESO+ very attractive to me. I might even use the crowns to buy an armorer.
What would be a deal-changer for you?
Favourite NPC: Wine-For-All
Mostly PC-EU , with a lonely little guy on NA.