I would recommend people to read Beaumont's Complete Book of Ballet on this one as this makes no reference to a third act only a final scene when the hunting party find Albrecht in the forest in the morning.
During the reign of MM there were over 30 World Premieres and just under 20 Company Premieres. As to how many of the former, and even the latter perhaps, will stand the test of time, we shall have to wait and see.
Can I just add that in my view the article in the Telegraph does no-one any favours, including Alina, and, perhaps, it would have been better if it had not been written !
BRB did perform this piece in their 1994/95 season, the last time that they performed it. In addition they were at ROH that season but I cannot say whether or not it was performed by them during that visit.