I can say with fair confidence that this 100% won't be happening. None of it makes sense, okay there's driver shortages but Cramlington to Killingworth in particular isn't a bad corridor.

If you want to really reduce stuff to make it easier I'd do the following rather than what you said for some of it:

43: Blyth to Newcastle, X8 from Blyth to Cramlington additionally serving Amersham Drive, 43 Cramlington to Newcastle (Every 30 Minutes)
44: Same Route (Every 30 Minutes)
45: Same Route or possible curtailed at Brunswick (Every 30 Minutes)

52: Cramlington to Newcastle, X8 from Cramlington to Annitsford, Fern Drive, 52 to Newcastle (Every 30 Mins)
53: Morpeth to North Shields, 43 from Morpeth to Cramlington; Current 53 from Cramlington to North Shields (Every Hour; Morpeth to Cramlington, Every 30 Mins Cramlington to North Shields)

55: Stay at 30 Minutes

X8: Withdrawn

51 / 54: I really don't know they're all over the place.

Interworking Patterns
53 -> 53 (Short) -> 53 (Short) -> 53 (Ashington, Morpeth Based) - Minibus
43 -> 45 -> 45 -> 44 -> 44 -> 43 (Blyth) - DD
52 -> 55 -> 55 -> 52 (Blyth or Ashington) - SD

I'm not sure why the 43 needs to be the most frequent one when it arguably serves very little unique pretty much and there's more than enough buses from Cramlington. Also there's no need for the 53 to be a full size bus, it ran with minibuses for years under the 343/344.