McD, Drai, Hyman, RHN, Kane, Henrique, Skinner and Arviddson are much better than Holloway.
Selling Holloway as a top 9 player in this case is a stretch, especially when Brown can do the same thing Holloway does. Besides the 9th player in top 9 will probably be decided by the opponent.
And yes, I am aware that Kane will probably miss some games (not as many as Holloway usually does), but Holloway is NOT a replacement for him.
As for Broberg, "almost every Oilers fan" probably means 2-3 excided fans, right? Most of us know that 2-3 good games do not make a player a star.
The best case scenario was indeed that Broberg would step up and become the #4 D-man on the team next season, but the realistic expectation was that he would be a #5-#7 D-man next season, and that he maybe still grows. Combine that with that fact that the only oppening in top 4 is on the side he is (much)weaker, and you'll see why not "almost all Oiler fans" had that oppinion, just very few vocal ones.
It is possible that the Oilers indeed lose a top 9 forward and a top 4 D-man for nothing, I'll give you that... But it is also possible (and probably more likely) that they lose 2 players which would had have no true impact this coming season... And I actually expect them to match one of the offers.