Unfortunately, this is not a very representative collection of his works. He wrote some excellent, more light-hearted poetry, as well as the very emotive war poems, and to round off your knowledge of this wonderful poet, I would advise going to the bookshop and purchasing an anthology of his work. A couple of decades ago, there was an excellent book entitled 'Up the Line to Death', which concentrated primarily on the war poems of men such as Owen, Sassoon, Graves, Brooke - but also included a fair share of their other work. See if you can find something similar, and enjoy 'Shadwell Stair', for example.
It's not really an emotional pladoyer - remember, he lived through these events, and when you analyse the poem, you'll see that it's a carefully controlled piece of writing. Check out the imagery, think about it and then watch E.M-Remarque's 'All Quiet on the Western Front'.
Unfortunately, knowing what war does does not stop us from wageing war.