I have now stitched up my station-to-station walk from both Abbey Wood and Shenfield to Whitechapel, and westwards to Reading, the westmost sections in the heat of the summer (so that would be “dun and dusty”).
Like all walks through an urban centre, the Elizabeth Line walk is not all meadows and wilderness, but the streetscapes are as varied as the landscapes, from proof-of-concept suburban housing to areas of regeneration, flyblown shopping thoroughfares (not just Oxford Street) to the asepsis of new-build areas which have yet to acquire a character. The walk through London, of course, throws up great contrasts in architecture.
The landscapes vary from totally rural patches (around Brentwood and west of Maidenhead) to the tiny parks dotted along the line and the big urban natural spaces of Lesnes Woods and Wormwood Scrubs.
Harold Wood station 
Manor Park cemetery 
Canal notice, Hackney 
Lesnes Wood, looking down towards Lesnes Abbey Park 
Fading light on a winter’s afternoon, looking upstream from Limehouse. 
Notice-board, Limehouse (with appalling capitalisation) 
Shopfront in Spitalfields 
Chancery Lane station and Staple Inn 
Memorial to Margaret MacDonald in Lincoln’s Inn Fields. 
Bridges over the canal and the railway at West Drayton 
The old Bath Road near Waltham St Lawrence 
River Loddon at Whistley Bridge, south of Twyford 
Caversham Lock and Weir
It would be interesting to walk the route again, swapping around the seasons. West to east is of course a possibility (if you don’t mind walking into the sunshine all the time).
Lwalks.London 