Burge can still prove he can eradicate them. I have no idea how many managers LoB has had during his career but it appears he hasn’t been favoured by many (probably any) of them. They can’t all be wrong. They also know a lot more than me or you.
You could easily counter many points you make here, and some sensible points you do make, however...
Burge has undoubtedly put better performances in this season, however he's rarely been put under pressure like last season, the defence protects and looks after him as a good defence should do.
At times he's had decisions to make he's been hesitant and made the right decision, just in time. Today is a example of a decision he made...He looks safer when guided by those who protect him and just shot stopping.
As you said O'Brien has likely had many managers in his career and as he's still young for a keeper had loan spells at clubs unlike Lee Burge... pressing question how many times tho has he been second choice to a senior keeper as opposed to a junior keeper?
Finally the point you make about him not being favoured by previous managers it's worth noting that managers that have favoured Lee Burge here have been the popular Mark Venus and the much loved Russell Slade. Even TM favoured RCC.
It's only MR that's favoured Burge since his return and this season in L2 where he's been largely looked after.
Many variables to the equation I think you'd agree.