You're also making a claim, specifically that bitcointalk members are more interested in shitcoins than they previously were. You sure about that? Even if you're gauging said interest by an increase in activity in the altcoin section, it could be due to bounty hunters becoming more active. That entire section (including all the subsections) has been a cesspool and a haven for the worst posters this forum has. That being the case, I don't think there needs to be another board added for shitcoin wallets.
Also: Theymos would never go for it, especially since he's rejected much better suggestions that have been made.
There are new bitcointalk members, which use altcoin much more than members with mainly bitcoin wallets. This is the market trend, based on whole crypto market facts - currently altcoin market volume win over bitcoin. And also altcoin wallets are more and more, so people, who use them, need information.