Probably somewhat controversial but a few things I'd consider on Gateshead/Newcastle bound routes
All services that continue to Gateshead Highway Roundabout no longer serve Jackson St but continue past High St West (the Gloucester) to roundabout cutting out unnecessary diversions (Gateshead has a perfectly good bus station! - Basically the 21 route)
Newcastle bound Xservices and Angel to Eldon Square to serve Tyne Bridge Slip Road - Pilgrim Street then Blackett St omitting Central Motorway (as per X9/X10)
Removal of Civic Centre bus stop (southbound) to prevent services being held up by red lights after missing the green due to passenger loading
RE: Go North East: Service Suggestions