Put this game on its feet, get rid of every gamebraking bug, imagine it's future, set some targets and a budget and go for crowdfunding. You cand add some goals for backers, beside cosmetic stuff - go fo personalization (naming ingame stuff by/after backers), put ingame statues or plaques written by backers (see Pillars of Eternity) or straight up let backers design in game items (they already redesigned and reskinned the entire legacy HnH). Use the funds that you get from the current shop and subscriptions for marketing purposes, so that you can make your crowdfund campaign well known all over the media. I've watched a lot of the crowdfunding scene. The difference between a successful and unsucsessful campaigns is in the marketing budget. I personally found out about Salem beta from a Paradox sponsored article in Pcgaming magazine. You already had that experience with Paradox, do not underestimate the power of marketing/advertising business. Set your targets better this time.
*Sorry for the patronizing tone. I work in marketing/sales*
I would personaly back it up (up to a resonable ammount). This way you get to keep your own game, shop and everything else.
My 2 scents
