No, the bunkers at Alwoodley are not as originally built. Many were raised up in hummocks above the level of the putting surface and facing the green, rather like those behind the 12th green at Augusta National, except that Alwoodley's were wild and unkempt. Downhill escapes were required. I don't know when they were converted to more standard bunkers. What I do know is that they were not regularly raked until after the 1st World War (once a week!). The roll-over tops were introduced some years ago in an attempt to provide difficulties of escape similar to steep sand faces which could no longer be maintained cost-effectively. There have been recent changes, too, but I shall not comment - they may not remain when the BUDA Cup visits.
We do not have a definitive course plan of MacKenzie's original. There is a MacKenzie sketch map made in about 1910 which shows work in progress (including the proposed new 10th green and 11th hole) and it is not possible to deduce exactly what the finished course may have had in the way of bunkering, but changes continued to be made even into the 1920s (bunkering on the short 7th, for instance). There are a number of photos of the 7th from the very earliest days up until the Second World War, and it seems that the bunkering was substantially different (in number, location and style) in each photo. There is also a 1910 map by HA Chapman, or, rather, two very similar 1910 maps by him - there are detail differences. Even if Alwoodley wished to do it there is no way they could restore the course to its original, as we don't know what the original was. For that matter, I suggest that there was no original - it seems to have developed over a number of years, MacKenzie tinkering as he went along. The routing, however, has not changed apart from the construction of a new 10th green (suggested by MacKenzie) and the relocation of the 6th green (in Mack's time). We simply could not work out whether the 11th has also been relocated. Permission was given to rebuild it in a different place, and MacKenzie has suggested it if ever the land for its tee became available (which it did after MacK was no longer welcome at the club). But there is no record to say that it was done and the bunkering is in the same place as it was on the earliest photographs. However, Chapman's and MacKenzie's maps suggest that it was originally located in a different position in relationship to the 12th tee (still in the same place)..... But how accurate were their maps?
Otherwise Alwoodley is pretty intact, the routing and strategy in particular.