The supposed in-house joke is that whenever you need to get a lump of Episcopalians to quiet down you bellow out "The Lord be with you!" and everyone shouts back, "and also with you!" Of course it's not just Episcopalians that got used to that response rather than "and with your spirit." The Roman Catholic Mass in English did the same thing. And I suppose just as with those who longed for a return to the 1928 BCP there were RC folk who, even with the move from Latin to English still thought that "and with your spirit" was a better sort of reply.
Well, the new official Roman Catholic Mass will return to "and with your spirit." You can see some of the changes in language HERE. Some of the changes seem quite unnecessary, some are rather odd - recasting the Nicene Creed in "I" form, some involve a reintroduction to the spirit world, "with your spirit" being a case in point. Another "spirit world" reaffirmation being the replacement in the Nicene Creed of "seen and unseen" with "visible and invisible." I believe some of these also involve changes in what was agreed on in the middle of the last century as common texts. So much for common texts.
The site on the Roman Missal is there to acquaint the faithful with the changes already made. When Episcopalians consider changing the Prayer Book it is a process that almost drives us all mad. Changes are proposed, looked at, revised, argued over, worked with, used for a trial period, reintroduced with new changes, voted on once, sent out for further use, and voted on again and if extremely fortunate finally produced for final use. The whole thing is a thirty year effort. The Missal web page indicates the process used by the English language committee (see HERE in sidebar) There is no indication that there was any trial use, but rather submission and examination of texts.
I'm not sure it is better or worse than other ways of doing it, but at least we regular paid up members of the congregation could make our case to keep, "and also with you" if we wished to.
So, dear friends in RC Land... The Lord be with you. (Respond as you wish.)