[Avodah] Out-of-Bounds? 2 - Unshalmah Parim S'faseinu

[rabbirichwolpoe at gmail.com]

Since the Hurban we no longer DO or perform Qarabonos
However we do recite the various texts concerning the Qorbanos instead

Recently, in studying Hirsch's Haggadah, I noticed that the recitation
of the procedure of Qorban Pesach, is an old, time-honored Minhag.
This apparently stems from "unshalmah parim s'faseinu'"

Similarly we recite various parshiyyos and TSBP re: the sacrifices in
our daily davening between brachos and Psuqei d.zimrah

Now along comes a rather liberal scholar who suggests doing away with all
mention of the parshiyyos and mishnayyos re: sacrifices and using stam
t'filah instead. He posits that any/every t'filah is m'qayeim "unshalmah"
and not just the reictation of passages that directly refer to qorbanos

Is this Liberal Scholar justified in his convictions to say any davening
at all to be m'qayeim "unshalmah"?

Or 
is this liberal scholar out-of-bounds for omitting all Qorbanos Texts
and using a non-traditional understanding of "unshalmah" in order to do
away with all direct referneces to sacrifices?

GS
RRW
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