Canada Water is no longer the overloaded point it once was, because those from the Overground can now pretty much always get in the next Jubilee train; previously the issue was these trains coming in completely full and people being unable to board. Outside the peaks, I have always found it one of the best interchanges along the JLE; it's far quicker and shorter between trains than Whitechapel is.
One of the benefits of doing the Whitechapel Shuffle to get from Canary Wharf to the Central Line, however, is they are both cross-platform interchanges - in fact, the only ones on the Elizabeth line overall!
One of the benefits of doing the Whitechapel Shuffle to get from Canary Wharf to the Central Line, however, is they are both cross-platform interchanges - in fact, the only ones on the Elizabeth line overall!