You better not make the 330 stop between Chermside and RBWH
Jokes aside, I have not though about rerouting the 340 from the CBD to Toombul/EJ, but there definitely is a tonne of merit with that idea. Sacrificing an express service between Chermside and RBWH would be a valid price to pay for converting the 340 into a decent orbital BUZ route.
I don’t really see a valid purpose of the 326 extending down to Toombul (unless the bus route goes there for capillarity), so I would prefer the 326 terminating at Sandgate and Carseldine stations via Bracken Ridge without going to Toombul. With this shortening the total length of the route, then fewer buses will be needed to maintain a decent frequency for the 326. Then the 325 could then be extended north to Sandgate station from Boondall station while also being cut to Chermside Interchange (unless the 325 needs to go beyond Chermside for capillarity).
(330 (red), 326 (green), 325 (blue).
Furthermore, the 326 in its current form is pretty bad with large portion of its route looping back on itself on Board St.