I disagree, as there are scholars that have articulated definable differences (or characteristics) between early and late Romanticism (such as in their comparisons between Schumann & Brahms lieder, for example). Plus, the 'period' instruments used in the early Romantic era can differ in sound and performance expectations, by quite a bit, from those used in the late Romantic era (so composers heard their music somewhat differently, which had to have had some effect on how they composed it, due to their expectations for how it would sound in performance).
However, that's not really my issue with Elgar's Symphonies. I wouldn't go as far as to call his symphonies romantically charged Edwardian 'schmaltz' or infused with a sentimental naivete that is foreign to today's world (even though there is some of that within these works), but like senza sordino, I don't think the symphonies are among Elgar's most inspired works. At least not to the same degree as "The Dream of Gerontius":
, "Enigma Variations", "Sospiri", Cello Concerto, "The Music Makers", etc..; although, yes, I wouldn't disagree that there are some beautiful passages & movements within the symphonies (such as the 3rd movement of the 1st Symphony:
).
As for recordings, interestingly, when EMI first asked Bernard Haitink to record Elgar's two symphonies, he declined, saying he didn't see any point in recording them, with Sir Adrian Boult's London Philharmonic EMI recordings in the catalogue. He didn't think he could do better than Boult. While EMI eventually prevailed over Haitink, I think he made a good point.
Nevertheless, Haitink's Philharmonia recording of Symphony no. 2 has received strong praise from the critics:
However, for pre-WW2 British composers, Sir Adrian Boult is my conductor of choice, followed closely by Barbirolli, Beecham, Sargent, Groves, Del Mar, Marriner, and Elgar himself (when available)--on the 1st tier, and then on the (very good) 2nd tier, Handley, Thomson, Hickox, and Haitink (and maybe Davis & Previn).
My two cents.