I personally don't understand why the Q3 exists North of Newcastle, as it is, least it had a point when it served the Great Park but now it is literal definition of pointless.

It literally duplicates the X46 and 49 on the unique bit and shadows the 35/43/44/45 along other parts of the route.

The 35/X46/Q3/49 badly need to be managed better imo and controlled into a few routes ie.

Q1: Fawdon - Gosforth - Newcastle - St Peters - Wallsend
Q2: Featherstone Grove - Regent Centre - Hollywood Avenue - Gosforth - Newcastle - St Peters
Q3: Great Park - Brunton Lane - Regent Centre - Gosforth - Jesmond - Newcastle - St Peters 

The fact they're all subsidised or have multiple existing subsidises (Q3) shouldn't make it exactly impossible to do, even if it meant GNE running them all with some of them electric and something else for the others (won't be enough if I'm correct).