This is exactly it, the automated system cuts down on costs. They already want to employ less community management staff (ie: loot trading) so RCR will most likely be in classic.
The problem with RCR in classic is that recruiting from the community for group content was a core part of the game. Sitting in a capital city asking for people to join your 5 man, or looking for a key to UBRS. How many posts will be considered “spam” by the community? How many people will be wrongfully flagged?
I fear RCR will have a negative impact on the community that was so famous in vanilla, especially if people are abusing it. Time will tell how big of a problem it will be, but I really hope blizzard is taking into account the review of “mass flagging” in a short period (which could be unjustifiable harassment from a rival guild, pvp group, etc.)