RD ” the conservative movement didn’t mess around much with nusach ashkanaz”
I once came across a conservative siddur and flipping through it I, at first, had the same impression. Untill I reached “ritzai” in Shmonah Esrai.There,they delete two words: ” v’ishey yisroal”. In a footnote in the back of this siddur it is explained that while karbonos were importent at the time of mattan torah in order to assure that there would be no human sacrifice,which was common then, nowdays we have no need for karbanos and we certainly do not look forward to,much less pray for the restoration of, any practice which involves cruelty to animals.So, with the deletion of 2 words, their siddur becomes not only different than our own, but pure apikorsus.(cf the Bais Halavi’s pshat in the raha’s question in the haggadah)